command: fsck
purpose: check and repair a Linux filesystem
syntax: fsck [-lsAVRTMNP] [-C [fd]] [-t fstype] [filesys...] [--]
[fs-specific-options]
examples:
1. To check a specific filesystem /dev/sda6
# fsck /dev/sda6
exit codes for fsck command
0 No errors
1 Filesystem errors corrected
2 System should be rebooted
4 Filesystem errors left uncorrected
8 Operational error
16 Usage or syntax error
32 Fsck canceled by user request
128 Shared-library error
2. To list all fsck checker commands
$ cd /sbin
$ ls fsck*
3. To check all filesystems at once
$ cd /etc/fstab
$ fsck -A
4. To check the ext3 filesystem on drive for this example we must
umount the filesystem first
$ fsck -t ext3 /dev/sda6
5. To force a filesystem check even if it is clean
# fsck /dev/sda6 -f
regards,
dhanasekar
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