lubuntu@lubuntu:/media/lubuntu$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0   1.5G  1 loop /rofs
sda      8:0    0  29.8G  0 disk /cdrom
├─sda1   8:1    0   1.6G  0 part 
└─sda2   8:2    0   3.7M  0 part 
sdb      8:16   0 465.8G  0 disk 
├─sdb1   8:17   0 517.7M  0 part [SWAP]
├─sdb2   8:18   0    15G  0 part 
└─sdb3   8:19   0 450.3G  0 part 
sr0     11:0    1  1024M  0 rom  
zram0  252:0    0   1.3G  0 disk [SWAP]
zram1  252:1    0   1.3G  0 disk [SWAP]
lubuntu@lubuntu:/media/lubuntu$ sudo mount -o ro /dev/sdb3 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb3, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ 


^
closed window
After installing https://repositorio.nti.ufal.br/debian/pool/main/x/xfsprogs/xfsprogs_3.2.1_amd64.deb (https://repositorio.nti.ufal.br/debian/pool/main/x/xfsprogs/xfsprogs_3.2.1_i386.deb = "Wrong architecture" on a desktop computer that I have access to)
new window
v


lubuntu@lubuntu:/media/lubuntu$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0   1.5G  1 loop /rofs
sda      8:0    0  29.8G  0 disk /cdrom
├─sda1   8:1    0   1.6G  0 part 
└─sda2   8:2    0   3.7M  0 part 
sdb      8:16   0 465.8G  0 disk 
├─sdb1   8:17   0 517.7M  0 part [SWAP]
├─sdb2   8:18   0    15G  0 part 
└─sdb3   8:19   0 450.3G  0 part 
sr0     11:0    1  1024M  0 rom  
zram0  252:0    0   1.3G  0 disk [SWAP]
zram1  252:1    0   1.3G  0 disk [SWAP]
lubuntu@lubuntu:/media/lubuntu$ sudo mount -o ro /dev/sdb3 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb3, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ sudo mount /dev/sdb3 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb3, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ ls
xf
lubuntu@lubuntu:/media/lubuntu$ sudo mount -t xfs -o ro /dev/sdb3 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb3, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ sudo mount --help

Usage:
 mount [-lhV]
 mount -a [options]
 mount [options] [--source] <source> | [--target] <directory>
 mount [options] <source> <directory>
 mount <operation> <mountpoint> [<target>]

Mount a filesystem.

Options:
 -a, --all               mount all filesystems mentioned in fstab
 -c, --no-canonicalize   don't canonicalize paths
 -f, --fake              dry run; skip the mount(2) syscall
 -F, --fork              fork off for each device (use with -a)
 -T, --fstab <path>      alternative file to /etc/fstab
 -i, --internal-only     don't call the mount.<type> helpers
 -l, --show-labels       show also filesystem labels
 -n, --no-mtab           don't write to /etc/mtab
     --options-mode <mode>
                         what to do with options loaded from fstab
     --options-source <source>
                         mount options source
     --options-source-force
                         force use of options from fstab/mtab
 -o, --options <list>    comma-separated list of mount options
 -O, --test-opts <list>  limit the set of filesystems (use with -a)
 -r, --read-only         mount the filesystem read-only (same as -o ro)
 -t, --types <list>      limit the set of filesystem types
     --source <src>      explicitly specifies source (path, label, uuid)
     --target <target>   explicitly specifies mountpoint
 -v, --verbose           say what is being done
 -w, --rw, --read-write  mount the filesystem read-write (default)
 -N, --namespace <ns>    perform mount in another namespace

 -h, --help              display this help
 -V, --version           display version

Source:
 -L, --label <label>     synonym for LABEL=<label>
 -U, --uuid <uuid>       synonym for UUID=<uuid>
 LABEL=<label>           specifies device by filesystem label
 UUID=<uuid>             specifies device by filesystem UUID
 PARTLABEL=<label>       specifies device by partition label
 PARTUUID=<uuid>         specifies device by partition UUID
 <device>                specifies device by path
 <directory>             mountpoint for bind mounts (see --bind/rbind)
 <file>                  regular file for loopdev setup

Operations:
 -B, --bind              mount a subtree somewhere else (same as -o bind)
 -M, --move              move a subtree to some other place
 -R, --rbind             mount a subtree and all submounts somewhere else
 --make-shared           mark a subtree as shared
 --make-slave            mark a subtree as slave
 --make-private          mark a subtree as private
 --make-unbindable       mark a subtree as unbindable
 --make-rshared          recursively mark a whole subtree as shared
 --make-rslave           recursively mark a whole subtree as slave
 --make-rprivate         recursively mark a whole subtree as private
 --make-runbindable      recursively mark a whole subtree as unbindable

For more details see mount(8).
lubuntu@lubuntu:/media/lubuntu$ man mount
lubuntu@lubuntu:/media/lubuntu$ sudo mount -l -t
mount: option requires an argument -- 't'
Try 'mount --help' for more information.
lubuntu@lubuntu:/media/lubuntu$ sudo mount -t -l
lubuntu@lubuntu:/media/lubuntu$ df -T
Filesystem     Type     1K-blocks    Used Available Use% Mounted on
udev           devtmpfs   2751268       0   2751268   0% /dev
tmpfs          tmpfs       555236    1260    553976   1% /run
/dev/sda       iso9660    1618848 1618848         0 100% /cdrom
/dev/loop0     squashfs   1552128 1552128         0 100% /rofs
/cow           overlay    2776168  146928   2629240   6% /
tmpfs          tmpfs      2776168   72844   2703324   3% /dev/shm
tmpfs          tmpfs         5120       4      5116   1% /run/lock
tmpfs          tmpfs      2776168       0   2776168   0% /sys/fs/cgroup
tmpfs          tmpfs      2776168    4464   2771704   1% /tmp
tmpfs          tmpfs       555232      12    555220   1% /run/user/999
lubuntu@lubuntu:/media/lubuntu$ lsblk -f
NAME   FSTYPE   LABEL               UUID                                 FSAVAIL FSUSE% MOUNTPOINT
loop0  squashfs                                                                0   100% /rofs
sda    iso9660  Lubuntu 19.04 amd64 2019-04-16-19-13-46-00                     0   100% /cdrom
├─sda1 iso9660  Lubuntu 19.04 amd64 2019-04-16-19-13-46-00                              
└─sda2 vfat     Lubuntu 19.04 amd64 039E-EF17                                           
sdb                                                                                     
├─sdb1 swap                                                                             [SWAP]
├─sdb2 xfs                          a870119e-1278-4c3c-a075-5793bde4788d                
└─sdb3                                                                                  
sr0                                                                                     
zram0                                                                                   [SWAP]
zram1                                                                                   [SWAP]
lubuntu@lubuntu:/media/lubuntu$ ls
xf
lubuntu@lubuntu:/media/lubuntu$ sudo mount -t xfs -o ro /dev/sdb2 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb2, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ sudo mount -o ro /dev/sdb2 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb2, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ sudo mount /dev/sdb2 xf
mount: /media/lubuntu/xf: wrong fs type, bad option, bad superblock on /dev/sdb2, missing codepage or helper program, or other error.
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck /dev/sdb2 > /home/lubuntu/Downloads/xfs
[missing text]
rtblock 91256046 expected type unknown got rtfree
rtblock 91256047 expected type unknown got rtfree
rtblock 91256048 expected type unknown got rtfree
rtblock 91256049 expected type unknown got rtfree
rtblock 91256050 expected type unknown got rtfree
rtblock 91256051 expected type unknown got rtfree
rtblock 91256052 expected type unknown got rtfree
rtblock 91256053 expected type unknown got rtfree
rtblock 91256054 expected type unknown got rtfree
rtblock 91256055 expected type unknown got rtfree
rtblock 91256056 expected type unknown got rtfree
rtblock 91256057 expected type unknown got rtfree
rtblock 91256058 expected type unknown got rtfree
rtblock 91256059 expected type unknown got rtfree
rtblock 91256060 expected type unknown got rtfree
rtblock 91256061 expected type unknown got rtfree
rtblock 91256062 expected type unknown got rtfree
rtblock 91256063 expected type unknown got rtfree
rtblock 91257856 expected type unknown got rtfree
rtblock 91257857 expected type unknown got rtfree
rtblock 91257858 expected type unknown got rtfree
rtblock 91257859 expected type unknown got rtfree
rtblock 91257860 expected type unknown got rtfree
rtblock 91257861 expected type unknown got rtfree
rtblock 91257862 expected type unknown got rtfree
rtblock 91257863 expected type unknown got rtfree
rtblock 91257864 expected type unknown got rtfree
rtblock 91257865 expected type unknown got rtfree
rtblock 91257866 expected type unknown got rtfree
rtblock 91257867 expected type unknown got rtfree
rtblock 91257868 expected type unknown got rtfree
rtblock 91257869 expected type unknown got rtfree
rtblock 91257870 expected type unknown got rtfree
rtblock 91257871 expected type unknown got rtfree
rtblock 91257872 expected type unknown got rtfree
rtblock 91257873 expected type unknown got rtfree
rtblock 91257874 expected type unknown got rtfree
rtblock 91257875 expected type unknown got rtfree
rtblock 91257876 expected type unknown got rtfree
rtblock 91257877 expected type unknown got rtfree
rtblock 91257878 expected type unknown got rtfree
rtblock 91257879 expected type unknown got rtfree
rtblock 91257880 expected type unknown got rtfree
rtblock 91257881 expected type unknown got rtfree
rtblock 91257882 expected type unknown got rtfree
rtblock 91257883 expected type unknown got rtfree
rtblock 91257884 expected type unknown got rtfree
rtblock 91257885 expected type unknown got rtfree
rtblock 91257886 expected type unknown got rtfree
rtblock 91257887 expected type unknown got rtfree
rtblock 91257888 expected type unknown got rtfree
rtblock 91257889 expected type unknown got rtfree
rtblock 91257890 expected type unknown got rtfree
rtblock 91257891 expected type unknown got rtfree
rtblock 91257892 expected type unknown got rtfree
rtblock 91257893 expected type unknown got rtfree
rtblock 91257894 expected type unknown got rtfree
rtblock 91257895 expected type unknown got rtfree
rtblock 91257896 expected type unknown got rtfree
rtblock 91257897 expected type unknown got rtfree
rtblock 91257898 expected type unknown got rtfree
rtblock 91257899 expected type unknown got rtfree
rtblock 91257900 expected type unknown got rtfree
rtblock 91257901 expected type unknown got rtfree
rtblock 91257902 expected type unknown got rtfree
rtblock 91257903 expected type unknown got rtfree
rtblock 91257904 expected type unknown got rtfree
rtblock 91257905 expected type unknown got rtfree
rtblock 91257906 expected type unknown got rtfree
rtblock 91257907 expected type unknown got rtfree
rtblock 91257908 expected type unknown got rtfree
rtblock 91257909 expected type unknown got rtfree
rtblock 91257910 expected type unknown got rtfree
rtblock 91257911 expected type unknown got rtfree
rtblock 91257912 expected type unknown got rtfree
rtblock 91257913 expected type unknown got rtfree
rtblock 91257914 expected type unknown got rtfree
rtblock 91257915 expected type unknown got rtfree
rtblock 91257916 expected type unknown got rtfree
rtblock 91257917 expected type unknown got rtfree
rtblock 91257918 expected type unknown got rtfree
rtblock 91257919 expected type unknown got rtfree
rtblock 91257920 expected type unknown got rtfree
rtblock 91257921 expected type unknown got rtfree
rtblock 91257922 expected type unknown got rtfree
rtblock 91257923 expected type unknown got rtfree
rtblock 91257924 expected type unknown got rtfree
rtblock 91257925 expected type unknown got rtfree
rtblock 91257926 expected type unknown got rtfree
rtblock 91257927 expected type unknown got rtfree
rtblock 91257928 expected type unknown got rtfree
rtblock 91257929 expected type unknown got rtfree
rtblock 91257930 expected type unknown got rtfree
rtblock 91257931 expected type unknown got rtfree
rtblock 91257932 expected type unknown got rtfree
rtblock 91257933 expected type unknown got rtfree
rtblock 91257934 expected type unknown got rtfree
rtblock 91257935 expected type unknown got rtfree
rtblock 91257936 expected type unknown got rtfree
rtblock 91257937 expected type unknown got rtfree
rtblock 91257938 expected type unknown got rtfree
rtblock 91257939 expected type unknown got rtfree
rtblock 91257940 expected type unknown got rtfree
rtblock 91257941 expected type unknown got rtfree
rtblock 91257942 expected type unknown got rtfree
rtblock 91257943 expected type unknown got rtfree
rtblock 91257944 expected type unknown got rtfree
rtblock 91257945 expected type unknown got rtfree
rtblock 91257946 expected type unknown got rtfree
rtblock 91257947 expected type unknown got rtfree
rtblock 91257948 expected type unknown got rtfree
rtblock 91257949 expected type unknown got rtfree
rtblock 91257950 expected type unknown got rtfree
rtblock 91257951 expected type unknown got rtfree
rtblock 91257952 expected type unknown got rtfree
rtblock 91257953 expected type unknown got rtfree
rtblock 91257954 expected type unknown got rtfree
rtblock 91257955 expected type unknown got rtfree
rtblock 91257956 expected type unknown got rtfree
rtblock 91257957 expected type unknown got rtfree
rtblock 91257958 expected type unknown got rtfree
rtblock 91257959 expected type unknown got rtfree
rtblock 91257960 expected type unknown got rtfree
rtblock 91257961 expected type unknown got rtfree
rtblock 91257962 expected type unknown got rtfree
rtblock 91257963 expected type unknown got rtfree
rtblock 91257964 expected type unknown got rtfree
rtblock 91257965 expected type unknown got rtfree
rtblock 91257966 expected type unknown got rtfree
rtblock 91257967 expected type unknown got rtfree
rtblock 91257968 expected type unknown got rtfree
rtblock 91257969 expected type unknown got rtfree
rtblock 91257970 expected type unknown got rtfree
rtblock 91257971 expected type unknown got rtfree
rtblock 91257972 expected type unknown got rtfree
rtblock 91257973 expected type unknown got rtfree
rtblock 91257974 expected type unknown got rtfree
rtblock 91257975 expected type unknown got rtfree
rtblock 91257976 expected type unknown got rtfree
rtblock 91257977 expected type unknown got rtfree
rtblock 91257978 expected type unknown got rtfree
rtblock 91257979 expected type unknown got rtfree
rtblock 91257980 expected type unknown got rtfree
rtblock 91257981 expected type unknown got rtfree
rtblock 91257982 expected type unknown got rtfree
rtblock 91257983 expected type unknown got rtfree
rtblock 91257984 expected type unknown got rtfree
rtblock 91257985 expected type unknown got rtfree
rtblock 91257986 expected type unknown got rtfree
rtblock 91257987 expected type unknown got rtfree
rtblock 91257988 expected type unknown got rtfree
rtblock 91257989 expected type unknown got rtfree
rtblock 91257990 expected type unknown got rtfree
rtblock 91257991 expected type unknown got rtfree
rtblock 91257992 expected type unknown got rtfree
rtblock 91257993 expected type unknown got rtfree
rtblock 91257994 expected type unknown got rtfree
rtblock 91257995 expected type unknown got rtfree
rtblock 91257996 expected type unknown got rtfree
rtblock 91257997 expected type unknown got rtfree
rtblock 91257998 expected type unknown got rtfree
rtblock 91257999 expected type unknown got rtfree
rtblock 91258000 expected type unknown got rtfree
rtblock 91258001 expected type unknown got rtfree
rtblock 91258002 expected type unknown got rtfree
rtblock 91258003 expected type unknown got rtfree
rtblock 91258004 expected type unknown got rtfree
rtblock 91258005 expected type unknown got rtfree
rtblock 91258006 expected type unknown got rtfree
rtblock 91258007 expected type unknown got rtfree
rtblock 91258008 expected type unknown got rtfree
rtblock 91258009 expected type unknown got rtfree
rtblock 91258010 expected type unknown got rtfree
rtblock 91258011 expected type unknown got rtfree
rtblock 91258012 expected type unknown got rtfree
rtblock 91258013 expected type unknown got rtfree
rtblock 91258014 expected type unknown got rtfree
rtblock 91258015 expected type unknown got rtfree
rtblock 91258016 expected type unknown got rtfree
rtblock 91258017 expected type unknown got rtfree
rtblock 91258018 expected type unknown got rtfree
rtblock 91258019 expected type unknown got rtfree
rtblock 91258020 expected type unknown got rtfree
rtblock 91258021 expected type unknown got rtfree
rtblock 91258022 expected type unknown got rtfree
rtblock 91258023 expected type unknown got rtfree
rtblock 91258024 expected type unknown got rtfree
rtblock 91258025 expected type unknown got rtfree
rtblock 91258026 expected type unknown got rtfree
rtblock 91258027 expected type unknown got rtfree
rtblock 91258028 expected type unknown got rtfree
rtblock 91258029 expected type unknown got rtfree
rtblock 91258030 expected type unknown got rtfree
rtblock 91258031 expected type unknown got rtfree
rtblock 91258032 expected type unknown got rtfree
rtblock 91258033 expected type unknown got rtfree
rtblock 91258034 expected type unknown got rtfree
rtblock 91258035 expected type unknown got rtfree
rtblock 91258036 expected type unknown got rtfree
rtblock 91258037 expected type unknown got rtfree
rtblock 91258038 expected type unknown got rtfree
rtblock 91258039 expected type unknown got rtfree
rtblock 91258040 expected type unknown got rtfree
rtblock 91258041 expected type unknown got rtfree
rtblock 91258042 expected type unknown got rtfree
rtblock 91258043 expected type unknown got rtfree
rtblock 91258044 expected type unknown got rtfree
rtblock 91258045 expected type unknown got rtfree
rtblock 91258046 expected type unknown got rtfree
rtblock 91258047 expected type unknown got rtfree
rtblock 91258048 expected type unknown got rtfree
rtblock 91258049 expected type unknown got rtfree
rtblock 91258050 expected type unknown got rtfree
rtblock 91258051 expected type unknown got rtfree
rtblock 91258052 expected type unknown got rtfree
rtblock 91258053 expected type unknown got rtfree
rtblock 91258054 expected type unknown got rtfree
rtblock 91258055 expected type unknown got rtfree
rtblock 91258056 expected type unknown got rtfree
rtblock 91258057 expected type unknown got rtfree
rtblock 91258058 expected type unknown got rtfree
rtblock 91258059 expected type unknown got rtfree
rtblock 91258060 expected type unknown got rtfree
rtblock 91258061 expected type unknown got rtfree
rtblock 91258062 expected type unknown got rtfree
rtblock 91258063 expected type unknown got rtfree
rtblock 91258064 expected type unknown got rtfree
rtblock 91258065 expected type unknown got rtfree
rtblock 91258066 expected type unknown got rtfree
rtblock 91258067 expected type unknown got rtfree
rtblock 91258068 expected type unknown got rtfree
rtblock 91258069 expected type unknown got rtfree
rtblock 91258070 expected type unknown got rtfree
rtblock 91258071 expected type unknown got rtfree
rtblock 91258072 expected type unknown got rtfree
rtblock 91258073 expected type unknown got rtfree
rtblock 91258074 expected type unknown got rtfree
rtblock 91258075 expected type unknown got rtfree
rtblock 91258076 expected type unknown got rtfree
rtblock 91258077 expected type unknown got rtfree
rtblock 91258078 expected type unknown got rtfree
rtblock 91258079 expected type unknown got rtfree
rtblock 91258080 expected type unknown got rtfree
rtblock 91258081 expected type unknown got rtfree
rtblock 91258082 expected type unknown got rtfree
rtblock 91258083 expected type unknown got rtfree
rtblock 91258084 expected type unknown got rtfree
rtblock 91258085 expected type unknown got rtfree
rtblock 91258086 expected type unknown got rtfree
rtblock 91258087 expected type unknown got rtfree
rtblock 91258088 expected type unknown got rtfree
rtblock 91258089 expected type unknown got rtfree
rtblock 91258090 expected type unknown got rtfree
rtblock 91258091 expected type unknown got rtfree
rtblock 91258092 expected type unknown got rtfree
rtblock 91258093 expected type unknown got rtfree
rtblock 91258094 expected type unknown got rtfree
rtblock 91258095 expected type unknown got rtfree
rtblock 91258096 expected type unknown got rtfree
rtblock 91258097 expected type unknown got rtfree
rtblock 91258098 expected type unknown got rtfree
rtblock 91258099 expected type unknown got rtfree
rtblock 91258100 expected type unknown got rtfree
rtblock 91258101 expected type unknown got rtfree
rtblock 91258102 expected type unknown got rtfree
rtblock 91258103 expected type unknown got rtfree
rtblock 91258104 expected type unknown got rtfree
rtblock 91258105 expected type unknown got rtfree
rtblock 91258106 expected type unknown got rtfree
rtblock 91258107 expected type unknown got rtfree
rtblock 91258108 expected type unknown got rtfree
rtblock 91258109 expected type unknown got rtfree
rtblock 91258110 expected type unknown got rtfree
rtblock 91258111 expected type unknown got rtfree
rtblock 91258112 expected type unknown got rtfree
rtblock 91258113 expected type unknown got rtfree
rtblock 91258114 expected type unknown got rtfree
rtblock 91258115 expected type unknown got rtfree
rtblock 91258116 expected type unknown got rtfree
rtblock 91258117 expected type unknown got rtfree
rtblock 91258118 expected type unknown got rtfree
rtblock 91258119 expected type unknown got rtfree
rtblock 91258120 expected type unknown got rtfree
rtblock 91258121 expected type unknown got rtfree
rtblock 91258122 expected type unknown got rtfree
rtblock 91258123 expected type unknown got rtfree
rtblock 91258124 expected type unknown got rtfree
rtblock 91258125 expected type unknown got rtfree
rtblock 91258126 expected type unknown got rtfree
rtblock 91258127 expected type unknown got rtfree
rtblock 91258128 expected type unknown got rtfree
rtblock 91258129 expected type unknown got rtfree
rtblock 91258130 expected type unknown got rtfree
rtblock 91258131 expected type unknown got rtfree
rtblock 91258132 expected type unknown got rtfree
rtblock 91258133 expected type unknown got rtfree
rtblock 91258134 expected type unknown got rtfree
rtblock 91258135 expected type unknown got rtfree
rtblock 91258136 expected type unknown got rtfree
rtblock 91258137 expected type unknown got rtfree
rtblock 91258138 expected type unknown got rtfree
rtblock 91258139 expected type unknown got rtfree
rtblock 91258140 expected type unknown got rtfree
rtblock 91258141 expected type unknown got rtfree
rtblock 91258142 expected type unknown got rtfree
rtblock 91258143 expected type unknown got rtfree
rtblock 91258144 expected type unknown got rtfree
rtblock 91258145 expected type unknown got rtfree
rtblock 91258146 expected type unknown got rtfree
rtblock 91258147 expected type unknown got rtfree
rtblock 91258148 expected type unknown got rtfree
rtblock 91258149 expected type unknown got rtfree
rtblock 91258150 expected type unknown got rtfree
rtblock 91258151 expected type unknown got rtfree
rtblock 91258152 expected type unknown got rtfree
rtblock 91258153 expected type unknown got rtfree
rtblock 91258154 expected type unknown got rtfree
rtblock 91258155 expected type unknown got rtfree
rtblock 91258156 expected type unknown got rtfree
rtblock 91258157 expected type unknown got rtfree
rtblock 91258158 expected type unknown got rtfree
rtblock 91258159 expected type unknown got rtfree
rtblock 91258160 expected type unknown got rtfree
rtblock 91258161 expected type unknown got rtfree
rtblock 91258162 expected type unknown got rtfree
rtblock 91258163 expected type unknown got rtfree
rtblock 91258164 expected type unknown got rtfree
rtblock 91258165 expected type unknown got rtfree
rtblock 91258166 expected type unknown got rtfree
rtblock 91258167 expected type unknown got rtfree
rtblock 91258168 expected type unknown got rtfree
rtblock 91258169 expected type unknown got rtfree
rtblock 91258170 expected type unknown got rtfree
rtblock 91258171 expected type unknown got rtfree
rtblock 91258172 expected type unknown got rtfree
rtblock 91258173 expected type unknown got rtfree
rtblock 91258174 expected type unknown got rtfree
rtblock 91258175 expected type unknown got rtfree
rtblock 91258176 expected type unknown got rtfree
rtblock 91258177 expected type unknown got rtfree
rtblock 91258178 expected type unknown got rtfree
rtblock 91258179 expected type unknown got rtfree
rtblock 91258180 expected type unknown got rtfree
rtblock 91258181 expected type unknown got rtfree
rtblock 91258182 expected type unknown got rtfree
rtblock 91258183 expected type unknown got rtfree
rtblock 91258184 expected type unknown got rtfree
rtblock 91258185 expected type unknown got rtfree
rtblock 91258186 expected type unknown got rtfree
rtblock 91258187 expected type unknown got rtfree
rtblock 91258188 expected type unknown got rtfree
rtblock 91258189 expected type unknown got rtfree
rtblock 91258190 expected type unknown got rtfree
rtblock 91258191 expected type unknown got rtfree
rtblock 91258192 expected type unknown got rtfree
rtblock 91258193 expected type unknown got rtfree
rtblock 91258194 expected type unknown got rtfree
rtblock 91258195 expected type unknown got rtfree
rtblock 91258196 expected type unknown got rtfree
rtblock 91258197 expected type unknown got rtfree
rtblock 91258198 expected type unknown got rtfree
rtblock 91258199 expected type unknown got rtfree
rtblock 91258200 expected type unknown got rtfree
rtblock 91258201 expected type unknown got rtfree
rtblock 91258202 expected type unknown got rtfree
rtblock 91258203 expected type unknown got rtfree
rtblock 91258204 expected type unknown got rtfree
rtblock 91258205 expected type unknown got rtfree
rtblock 91258206 expected type unknown got rtfree
rtblock 91258207 expected type unknown got rtfree
rtblock 91258208 expected type unknown got rtfree
rtblock 91258209 expected type unknown got rtfree
rtblock 91258210 expected type unknown got rtfree
rtblock 91258211 expected type unknown got rtfree
rtblock 91258212 expected type unknown got rtfree
rtblock 91258213 expected type unknown got rtfree
rtblock 91258214 expected type unknown got rtfree
rtblock 91258215 expected type unknown got rtfree
rtblock 91258216 expected type unknown got rtfree
rtblock 91258217 expected type unknown got rtfree
rtblock 91258218 expected type unknown got rtfree
rtblock 91258219 expected type unknown got rtfree
rtblock 91258220 expected type unknown got rtfree
rtblock 91258221 expected type unknown got rtfree
rtblock 91258222 expected type unknown got rtfree
rtblock 91258223 expected type unknown got rtfree
rtblock 91258224 expected type unknown got rtfree
rtblock 91258225 expected type unknown got rtfree
rtblock 91258226 expected type unknown got rtfree
rtblock 91258227 expected type unknown got rtfree
rtblock 91258228 expected type unknown got rtfree
rtblock 91258229 expected type unknown got rtfree
rtblock 91258230 expected type unknown got rtfree
rtblock 91258231 expected type unknown got rtfree
rtblock 91258232 expected type unknown got rtfree
rtblock 91258233 expected type unknown got rtfree
rtblock 91258234 expected type unknown got rtfree
rtblock 91258235 expected type unknown got rtfree
rtblock 91258236 expected type unknown got rtfree
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rtblock 91258250 expected type unknown got rtfree
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rtblock 91258265 expected type unknown got rtfree
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rtblock 91258270 expected type unknown got rtfree
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rtblock 91258280 expected type unknown got rtfree
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rtblock 91258299 expected type unknown got rtfree
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rtblock 91258302 expected type unknown got rtfree
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rtblock 91258310 expected type unknown got rtfree
rtblock 91258311 expected type unknown got rtfree
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rtblock 91258314 expected type unknown got rtfree
rtblock 91258315 expected type unknown got rtfree
rtblock 91258316 expected type unknown got rtfree
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rtblock 91258321 expected type unknown got rtfree
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rtblock 91258325 expected type unknown got rtfree
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rtblock 91258333 expected type unknown got rtfree
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rtblock 91258340 expected type unknown got rtfree
rtblock 91258341 expected type unknown got rtfree
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rtblock 91258360 expected type unknown got rtfree
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rtblock 91258410 expected type unknown got rtfree
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rtblock 91258460 expected type unknown got rtfree
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rtblock 91258499 expected type unknown got rtfree
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rtblock 91258510 expected type unknown got rtfree
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rtblock 91258514 expected type unknown got rtfree
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rtblock 91258527 expected type unknown got rtfree
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rtblock 91258560 expected type unknown got rtfree
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rtblock 91258566 expected type unknown got rtfree
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rtblock 91258570 expected type unknown got rtfree
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rtblock 91258610 expected type unknown got rtfree
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rtblock 91259392 expected type unknown got rtfree
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rtblock 91259433 expected type unknown got rtfree
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rtblock 91259440 expected type unknown got rtfree
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rtblock 91259466 expected type unknown got rtfree
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rtblock 91259468 expected type unknown got rtfree
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rtblock 91259470 expected type unknown got rtfree
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rtblock 91259478 expected type unknown got rtfree
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rtblock 91259499 expected type unknown got rtfree
rtblock 91259500 expected type unknown got rtfree
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rtblock 91259510 expected type unknown got rtfree
rtblock 91259511 expected type unknown got rtfree
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rtblock 91259514 expected type unknown got rtfree
rtblock 91259515 expected type unknown got rtfree
rtblock 91259516 expected type unknown got rtfree
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rtblock 91259518 expected type unknown got rtfree
rtblock 91259519 expected type unknown got rtfree
rtblock 91259520 expected type unknown got rtfree
rtblock 91259521 expected type unknown got rtfree
rtblock 91259522 expected type unknown got rtfree
rtblock 91259523 expected type unknown got rtfree
rtblock 91259524 expected type unknown got rtfree
rtblock 91259525 expected type unknown got rtfree
rtblock 91259526 expected type unknown got rtfree
rtblock 91259527 expected type unknown got rtfree
rtblock 91259528 expected type unknown got rtfree
rtblock 91259529 expected type unknown got rtfree
rtblock 91259530 expected type unknown got rtfree
rtblock 91259531 expected type unknown got rtfree
rtblock 91259532 expected type unknown got rtfree
rtblock 91259533 expected type unknown got rtfree
rtblock 91259534 expected type unknown got rtfree
rtblock 91259535 expected type unknown got rtfree
rtblock 91259536 expected type unknown got rtfree
rtblock 91259537 expected type unknown got rtfree
rtblock 91259538 expected type unknown got rtfree
rtblock 91259539 expected type unknown got rtfree
rtblock 91259540 expected type unknown got rtfree
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rtblock 91259542 expected type unknown got rtfree
rtblock 91259543 expected type unknown got rtfree
rtblock 91259544 expected type unknown got rtfree
rtblock 91259545 expected type unknown got rtfree
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rtblock 91259547 expected type unknown got rtfree
rtblock 91259548 expected type unknown got rtfree
rtblock 91259549 expected type unknown got rtfree
rtblock 91259550 expected type unknown got rtfree
rtblock 91259551 expected type unknown got rtfree
rtblock 91259552 expected type unknown got rtfree
rtblock 91259553 expected type unknown got rtfree
rtblock 91259554 expected type unknown got rtfree
rtblock 91259555 expected type unknown got rtfree
rtblock 91259556 expected type unknown got rtfree
rtblock 91259557 expected type unknown got rtfree
rtblock 91259558 expected type unknown got rtfree
rtblock 91259559 expected type unknown got rtfree
rtblock 91259560 expected type unknown got rtfree
rtblock 91259561 expected type unknown got rtfree
rtblock 91259562 expected type unknown got rtfree
rtblock 91259563 expected type unknown got rtfree
rtblock 91259564 expected type unknown got rtfree
rtblock 91259565 expected type unknown got rtfree
rtblock 91259566 expected type unknown got rtfree
rtblock 91259567 expected type unknown got rtfree
rtblock 91259568 expected type unknown got rtfree
rtblock 91259569 expected type unknown got rtfree
rtblock 91259570 expected type unknown got rtfree
rtblock 91259571 expected type unknown got rtfree
rtblock 91259572 expected type unknown got rtfree
rtblock 91259573 expected type unknown got rtfree
rtblock 91259574 expected type unknown got rtfree
rtblock 91259575 expected type unknown got rtfree
rtblock 91259576 expected type unknown got rtfree
rtblock 91259577 expected type unknown got rtfree
rtblock 91259578 expected type unknown got rtfree
rtblock 91259579 expected type unknown got rtfree
rtblock 91259580 expected type unknown got rtfree
rtblock 91259581 expected type unknown got rtfree
rtblock 91259582 expected type unknown got rtfree
rtblock 91259583 expected type unknown got rtfree
rtblock 91259584 expected type unknown got rtfree
rtblock 91259585 expected type unknown got rtfree
rtblock 91259586 expected type unknown got rtfree
rtblock 91259587 expected type unknown got rtfree
rtblock 91259588 expected type unknown got rtfree
rtblock 91259589 expected type unknown got rtfree
rtblock 91259590 expected type unknown got rtfree
rtblock 91259591 expected type unknown got rtfree
rtblock 91259592 expected type unknown got rtfree
rtblock 91259593 expected type unknown got rtfree
rtblock 91259594 expected type unknown got rtfree
rtblock 91259595 expected type unknown got rtfree
rtblock 91259596 expected type unknown got rtfree
rtblock 91259597 expected type unknown got rtfree
rtblock 91259598 expected type unknown got rtfree
rtblock 91259599 expected type unknown got rtfree
rtblock 91259600 expected type unknown got rtfree
rtblock 91259601 expected type unknown got rtfree
rtblock 91259602 expected type unknown got rtfree
rtblock 91259603 expected type unknown got rtfree
rtblock 91259604 expected type unknown got rtfree
rtblock 91259605 expected type unknown got rtfree
rtblock 91259606 expected type unknown got rtfree
rtblock 91259607 expected type unknown got rtfree
rtblock 91259608 expected type unknown got rtfree
rtblock 91259609 expected type unknown got rtfree
rtblock 91259610 expected type unknown got rtfree
rtblock 91259611 expected type unknown got rtfree
rtblock 91259612 expected type unknown got rtfree
rtblock 91259613 expected type unknown got rtfree
rtblock 91259614 expected type unknown got rtfree
rtblock 91259615 expected type unknown got rtfree
rtblock 91259616 expected type unknown got rtfree
rtblock 91259617 expected type unknown got rtfree
rtblock 91259618 expected type unknown got rtfree
rtblock 91259619 expected type unknown got rtfree
rtblock 91259620 expected type unknown got rtfree
rtblock 91259621 expected type unknown got rtfree
rtblock 91259622 expected type unknown got rtfree
rtblock 91259623 expected type unknown got rtfree
rtblock 91259624 expected type unknown got rtfree
rtblock 91259625 expected type unknown got rtfree
rtblock 91259626 expected type unknown got rtfree
rtblock 91259627 expected type unknown got rtfree
rtblock 91259628 expected type unknown got rtfree
rtblock 91259629 expected type unknown got rtfree
rtblock 91259630 expected type unknown got rtfree
rtblock 91259631 expected type unknown got rtfree
rtblock 91259632 expected type unknown got rtfree
rtblock 91259633 expected type unknown got rtfree
rtblock 91259634 expected type unknown got rtfree
rtblock 91259635 expected type unknown got rtfree
rtblock 91259636 expected type unknown got rtfree
rtblock 91259637 expected type unknown got rtfree
rtblock 91259638 expected type unknown got rtfree
rtblock 91259639 expected type unknown got rtfree
rtblock 91259640 expected type unknown got rtfree
rtblock 91259641 expected type unknown got rtfree
rtblock 91259642 expected type unknown got rtfree
rtblock 91259643 expected type unknown got rtfree
rtblock 91259644 expected type unknown got rtfree
rtblock 91259645 expected type unknown got rtfree
rtblock 91259646 expected type unknown got rtfree
rtblock 91259647 expected type unknown got rtfree
^C
xfs_db> echo above is from blockget -n
[...]
xfs_db> clear
xfs_db> help
xfs_db> blockget -n
xfs_db> help
xfs_db> q
lubuntu@lubuntu:/media/lubuntu$ vim /home/lubuntu/Downloads/xfs
lubuntu@lubuntu:/media/lubuntu$ xfs_db /dev/sdb2
xfs_db: cannot open /dev/sdb2: Permission denied
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_db /dev/sdb2
xfs_db> hel
command hel not found
xfs_db> help
ablock filoff -- set address to file offset (attr fork)
addr [field-expression] -- set current address
agf [agno] -- set address to agf header
agfl [agno] -- set address to agfl block
agi [agno] -- set address to agi header
back -- move to the previous location in the position ring
blockfree -- free block usage information
blockget [-s|-v] [-n] [-t] [-b bno]... [-i ino] ... -- get block usage and check consistency
blockuse [-n] [-c blockcount] -- print usage for current block(s)
bmap [-ad] [block [len]] -- show block map for current file
convert type num [type num]... type -- convert from one address form to another
daddr [d] -- set address to daddr value
dblock filoff -- set address to file offset (data fork)
debug [flagbits] -- set debug option bits
dquot [projid|gid|uid] -- set current address to project, group or user quota block
echo [args]... -- echo arguments
forward -- move forward to next entry in the position ring
frag [-a] [-d] [-f] [-l] [-q] [-R] [-r] [-v] -- get file fragmentation data
freesp [-bcdfs] [-a agno]... [-e binsize] [-h h1]... [-m binmult] -- summarize free space for filesystem
fsblock [fsb] -- set address to fsblock value
hash string -- calculate hash value
help [command] -- help for one or all commands
inode [inode#] -- set current inode
label [label] -- write/print FS label
log [stop|start <filename>] -- start or stop logging to a file
metadump [-e] [-g] [-m max_extent] [-w] [-o] filename -- dump metadata to a file
ncheck [-s] [-i ino] ... -- print inode-name pairs
pop -- pop location from the stack
print [value]... -- print field values
push [command] -- push location to the stack
quit -- exit xfs_db
ring -- show position ring or move to a specific entry
sb [agno] -- set current address to sb header
source source-file -- get commands from source-file
stack -- view the location stack
type [newtype] -- set/show current data type
uuid [uuid] -- write/print FS uuid
version [feature | [vnum fnum]] -- set feature bit(s) in the sb version field

Use 'help commandname' for extended help.
xfs_db> exit
command exit not found
xfs_db> q
lubuntu@lubuntu:/media/lubuntu$ xfsdump

Command 'xfsdump' not found, but can be installed with:

sudo apt install xfsdump

lubuntu@lubuntu:/media/lubuntu$ xfs

Command 'xfs' not found, did you mean:

  command 'xjs' from snap xjs (0+git.6419369)
  command 'xbs' from deb xbs (0-10build1)
  command 'fs' from deb openafs-client (1.8.2-1ubuntu0.1)
  command 'xhfs' from deb hfsutils-tcltk (3.2.6-14)
  command 'zfs' from deb zfsutils-linux (0.7.12-1ubuntu5)
  command 'zfs' from deb zfs-fuse (0.7.0-19)
  command 'bfs' from deb bfs (1.3.3-1)
  command 'hfs' from deb hfsutils-tcltk (3.2.6-14)
  command 'xfd' from deb x11-utils (7.7+4)
  command 'xfe' from deb xfe (1.43.1-1)
  command 'sxfs' from deb sx (2.0+ds-4build2)
  command 'xfsm' from deb alliance (5.1.1-3)

See 'snap info <snapname>' for additional versions.

lubuntu@lubuntu:/media/lubuntu$ xfs_check -s /dev/sdb2

Command 'xfs_check' not found, did you mean:

  command 'xfs_ncheck' from deb xfsprogs (4.15.1-1ubuntu1)

Try: sudo apt install <deb name>

lubuntu@lubuntu:/media/lubuntu$ xfs_ncheck -s /dev/sdb2
xfs_ncheck: cannot open /dev/sdb2: Permission denied
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -s /dev/sdb2
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -v /dev/sdb2
ncheck: invalid option -- 'v'
bad option -? for ncheck command
lubuntu@lubuntu:/media/lubuntu$ xfs_ncheck -?
Illegal option -?
usage: xfs_ncheck [-sfV] [-l logdev] [-i ino]... special
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -V /dev/sdb2
xfs_ncheck version 3.2.1
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -i 14025 /dev/sdb2
      14025 viewer/segments/Rcrd-03-18-2015-1027-08-10405-ch501-min65535-src2.mpg/0000000006023020544
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -i 1 /dev/sdb2
lubuntu@lubuntu:/media/lubuntu$ sudo xfs_ncheck -i 0 /dev/sdb2
lubuntu@lubuntu:/media/lubuntu$ fdisk -l
fdisk: cannot open /dev/loop0: Permission denied
fdisk: cannot open /dev/sda: Permission denied
fdisk: cannot open /dev/sdb: Permission denied
fdisk: cannot open /dev/zram0: Permission denied
fdisk: cannot open /dev/zram1: Permission denied
lubuntu@lubuntu:/media/lubuntu$ sudo fdisk -l
Disk /dev/loop0: 1.5 GiB, 1589342208 bytes, 3104184 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 29.8 GiB, 32015679488 bytes, 62530624 sectors
Disk model: Cruzer Glide    
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0f9be39a

Device     Boot   Start     End Sectors  Size Id Type
/dev/sda1  *          0 3237695 3237696  1.6G  0 Empty
/dev/sda2       3211356 3218843    7488  3.7M ef EFI (FAT-12/16/32)


Disk /dev/sdb: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: WDC WD5000AVVS-6
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot    Start       End   Sectors   Size Id Type
/dev/sdb1             64   1060289   1060226 517.7M 82 Linux swap / Solaris
/dev/sdb2        1060296  32531624  31471329    15G 83 Linux
/dev/sdb3       32531632 976768064 944236433 450.3G 83 Linux




Disk /dev/zram0: 1.3 GiB, 1421402112 bytes, 347022 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/zram1: 1.3 GiB, 1421402112 bytes, 347022 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
lubuntu@lubuntu:/media/lubuntu$ fdisk --help

Usage:
 fdisk [options] <disk>      change partition table
 fdisk [options] -l [<disk>] list partition table(s)

Display or manipulate a disk partition table.

Options:
 -b, --sector-size <size>      physical and logical sector size
 -B, --protect-boot            don't erase bootbits when creating a new label
 -c, --compatibility[=<mode>]  mode is 'dos' or 'nondos' (default)
 -L, --color[=<when>]          colorize output (auto, always or never)
                                 colors are enabled by default
 -l, --list                    display partitions and exit
 -o, --output <list>           output columns
 -t, --type <type>             recognize specified partition table type only
 -u, --units[=<unit>]          display units: 'cylinders' or 'sectors' (default)
 -s, --getsz                   display device size in 512-byte sectors [DEPRECATED]
     --bytes                   print SIZE in bytes rather than in human readable format
 -w, --wipe <mode>             wipe signatures (auto, always or never)
 -W, --wipe-partitions <mode>  wipe signatures from new partitions (auto, always or never)

 -C, --cylinders <number>      specify the number of cylinders
 -H, --heads <number>          specify the number of heads
 -S, --sectors <number>        specify the number of sectors per track

 -h, --help                    display this help
 -V, --version                 display version

Available output columns:
 gpt: Device Start End Sectors Size Type Type-UUID Attrs Name UUID
 dos: Device Start End Sectors Cylinders Size Type Id Attrs Boot End-C/H/S Start-C/H/S
 bsd: Slice Start End Sectors Cylinders Size Type Bsize Cpg Fsize
 sgi: Device Start End Sectors Cylinders Size Type Id Attrs
 sun: Device Start End Sectors Cylinders Size Type Id Flags

For more details see fdisk(8).
lubuntu@lubuntu:/media/lubuntu$ fdisk -C /dev/sdb
fdisk: invalid cylinders argument: '/dev/sdb'
lubuntu@lubuntu:/media/lubuntu$ fdisk /dev/sdb

Welcome to fdisk (util-linux 2.33.1).                                                                                        
Changes will remain in memory only, until you decide to write them.                                                          
Be careful before using the write command.

fdisk: cannot open /dev/sdb: Permission denied
lubuntu@lubuntu:/media/lubuntu$ sudo fdisk /dev/sdb

Welcome to fdisk (util-linux 2.33.1).                                                                                        
Changes will remain in memory only, until you decide to write them.                                                          
Be careful before using the write command.


Command (m for help): m

Help:

  DOS (MBR)
   a   toggle a bootable flag
   b   edit nested BSD disklabel
   c   toggle the dos compatibility flag

  Generic
   d   delete a partition
   F   list free unpartitioned space
   l   list known partition types
   n   add a new partition
   p   print the partition table
   t   change a partition type
   v   verify the partition table
   i   print information about a partition

  Misc
   m   print this menu
   u   change display/entry units
   x   extra functionality (experts only)

  Script
   I   load disk layout from sfdisk script file
   O   dump disk layout to sfdisk script file

  Save & Exit
   w   write table to disk and exit
   q   quit without saving changes

  Create a new label
   g   create a new empty GPT partition table
   G   create a new empty SGI (IRIX) partition table
   o   create a new empty DOS partition table
   s   create a new empty Sun partition table


Command (m for help): l

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris        
 1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden or  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx         
 5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data    
 6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility   
 8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt         
 9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access     
 a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O        
 b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor      
 c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi ea  Rufus alignment
 e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         eb  BeOS fs        
 f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ee  GPT            
10  OPUS            55  EZ-Drive        a7  NeXTSTEP        ef  EFI (FAT-12/16/
11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f0  Linux/PA-RISC b
12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f1  SpeedStor      
14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f4  SpeedStor      
16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      f2  DOS secondary  
17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fb  VMware VMFS    
18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fc  VMware VMKCORE 
1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fd  Linux raid auto
1c  Hidden W95 FAT3 75  PC/IX           bc  Acronis FAT32 L fe  LANstep        
1e  Hidden W95 FAT1 80  Old Minix       be  Solaris boot    ff  BBT            

Command (m for help): i
Partition number (1-3, default 3): 1

         Device: /dev/sdb1
          Start: 64
            End: 1060289
        Sectors: 1060226
      Cylinders: 66
           Size: 517.7M
             Id: 82
           Type: Linux swap / Solaris
    Start-C/H/S: 0/1/1
      End-C/H/S: 65/254/63

Command (m for help): i
Partition number (1-3, default 3): 2

         Device: /dev/sdb2
          Start: 1060296
            End: 32531624
        Sectors: 31471329
      Cylinders: 1959
           Size: 15G
             Id: 83
           Type: Linux
    Start-C/H/S: 66/0/1
      End-C/H/S: 1023/254/63

Command (m for help): i
Partition number (1-3, default 3): 3

         Device: /dev/sdb3
          Start: 32531632
            End: 976768064
        Sectors: 944236433
      Cylinders: 58776
           Size: 450.3G
             Id: 83
           Type: Linux
    Start-C/H/S: 1023/254/63
      End-C/H/S: 1023/254/63

Command (m for help): F
Unpartitioned space /dev/sdb: 2 MiB, 2121728 bytes, 4144 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

    Start       End Sectors Size
976769024 976773167    4144   2M

Command (m for help): p
Disk /dev/sdb: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Disk model: WDC WD5000AVVS-6
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot    Start       End   Sectors   Size Id Type
/dev/sdb1             64   1060289   1060226 517.7M 82 Linux swap / Solaris
/dev/sdb2        1060296  32531624  31471329    15G 83 Linux
/dev/sdb3       32531632 976768064 944236433 450.3G 83 Linux

Command (m for help): v
Remaining 5116 unallocated 512-byte sectors.

Command (m for help): x

Expert command (m for help): m

Help (expert commands):

  DOS (MBR)
   b   move beginning of data in a partition
   i   change the disk identifier

  Geometry (for the current label)
   c   change number of cylinders
   h   change number of heads
   s   change number of sectors/track

  Generic
   p   print the partition table
   v   verify the partition table
   d   print the raw data of the first sector from the device
   D   print the raw data of the disklabel from the device
   f   fix partitions order
   m   print this menu

  Save & Exit
   q   quit without saving changes
   r   return to main menu


Expert command (m for help): d


First sector: offset = 0, size = 512 bytes.
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
*
000001b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 01
000001c0  01 00 82 fe 3f 41 40 00  00 00 82 2d 10 00 00 00
000001d0  01 42 83 fe ff ff c8 2d  10 00 e1 36 e0 01 00 fe
000001e0  ff ff 83 fe ff ff b0 64  f0 01 91 e7 47 38 00 00
000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa

Expert command (m for help): D

MBR: offset = 0, size = 512 bytes.
00000000  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00
*
000001b0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 01
000001c0  01 00 82 fe 3f 41 40 00  00 00 82 2d 10 00 00 00
000001d0  01 42 83 fe ff ff c8 2d  10 00 e1 36 e0 01 00 fe
000001e0  ff ff 83 fe ff ff b0 64  f0 01 91 e7 47 38 00 00
000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 55 aa

Expert command (m for help): O
O: unknown command

Expert command (m for help): r

Command (m for help): O

Enter script file name: sfdisk1

Script successfully saved.

Command (m for help): q

lubuntu@lubuntu:/media/lubuntu$ ls
sfdisk1  xf
lubuntu@lubuntu:/media/lubuntu$ mv sfdisk1 /home/lubuntu/Downloads
mv: cannot move 'sfdisk1' to '/home/lubuntu/Downloads/sfdisk1': Permission denied
lubuntu@lubuntu:/media/lubuntu$ sudo mv sfdisk1 /home/lubuntu/Downloads
lubuntu@lubuntu:/media/lubuntu$ mv /home/lubuntu/Downloads/xfs /home/lubuntu/Downloads/xfs.txt
lubuntu@lubuntu:/media/lubuntu$ xxf /home/lubuntu/Downloads/xfs.t

Command 'xxf' not found, did you mean:

  command 'xx' from deb fex-utils (20160919-1)
  command 'xqf' from deb xqf (1.0.6-2build1)
  command 'xxd' from deb xxd (2:8.1.0320-1ubuntu3)

Try: sudo apt install <deb name>

lubuntu@lubuntu:/media/lubuntu$ xxd /home/lubuntu/Downloads/xfs.t
lubuntu@lubuntu:/media/lubuntu$ echo /home/lubuntu/Downloads/xfs.t = zero-byte file
/home/lubuntu/Downloads/xfs.t = zero-byte file
lubuntu@lubuntu:/media/lubuntu$ rm /home/lubuntu/Downloads/xfs.t&date
[1] 4061
Mon May 24 18:53:58 UTC 2021
lubuntu@lubuntu:/media/lubuntu$ mv /home/lubuntu/Downloads/sfdisk1 /home/lubuntu/Downloads/sfdisk1.txt&date
[1] 4069
Mon May 24 18:54:43 UTC 2021
lubuntu@lubuntu:/media/lubuntu$ mv /home/lubuntu/Downloads/xf /home/lubuntu/Downloads/xf.txt&date
[1] 4082
Mon May 24 18:56:15 UTC 2021





https://duckduckgo.com/?q=linux+mount+hard+drive+as+read+only&t=canonical&ia=web
https://duckduckgo.com/?q=odd&t=canonical&ia=web
https://askubuntu.com/questions/296331/how-to-mount-a-hard-disk-as-read-only-from-the-terminal#296342
https://duckduckgo.com/?q=mounting+an+xfs+hard+drive+linux&t=canonical&ia=web
https://www.xmodulo.com/create-mount-xfs-file-system-linux.html
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/xfsmounting
https://duckduckgo.com/?q=linux+detect+filesystem+of+device&t=canonical&ia=web
https://www.xmodulo.com/detect-file-system-type-unmounted-device.html
https://duckduckgo.com/?q=wrong+fs+type%2C+bad+option%2C+bad+superblock+on+%2Fdev%2Fsdb2%2C+missing+codepage+or+helper+program%2C+or+other+error.&t=canonical&ia=web
https://duckduckgo.com/?q=can%27t+mount+xfs+on+linux&t=canonical&ia=web
https://access.redhat.com/solutions/140543
https://unix.stackexchange.com/questions/315063/mount-wrong-fs-type-bad-option-bad-superblock#315070
https://duckduckgo.com/?q=xfs_db&t=canonical&ia=web
https://linux.die.net/man/8/xfs_db
https://duckduckgo.com/?q=file+which+contains+stdout+and+stdin+linux&t=canonical&ia=web
https://duckduckgo.com/?q=rtblock+expected+type+unknown+got+rtfree&t=canonical&ia=web
https://linux.die.net/man/8/xfs_check
rtblock b expected type unknown got y
    The real-time block is used multiple times (shared).
https://linux.die.net/man/8/xfsdump
https://www.google.com/search?q=%22viewer/segments/Rcrd%22&client=ubuntu&hs=Bwx&channel=fs&filter=0&biw=1280&bih=890
https://www.dbstalk.com/community/index.php?threads/gparted-ext-hd-s.219368/page-2
https://www.dbstalk.com/community/index.php?threads/how-to-copy-and-replace-internal-hard-drive.140114/page-39
https://www.dbstalk.com/community/index.php?threads/can-the-hr34-record-a-whole-transponder.190563/page-3
https://www.dbstalk.com/community/index.php?threads/gparted-ext-hd-s.219368/

xfs_ncheck - stdout example

xfsncheckstdoutex

"/home/lubuntu/Downloads/sfdisk1.txt" - from fdisk
"/home/lubuntu/Downloads/xf.txt" - research
"/home/lubuntu/Downloads/xfs.txt" - all files in an XFS hard drive I guess

Format of file "xfs.txt":
inode(true), filepath(maybe true)

xfs_ncheck; xfs ncheck; viewer/segments/Rcrd; text file; TXT file; plain text file

eng