Introduction
fsck (File System Check) is a frontend utility that checks your file systems and if it founds some problem ask you about an action to take.
Sintax
fsck [options] [filesystem-list]
Some Options
Global Options-A (all) means that it is going to process all the file systems listed in /etc/fstab file in parallel if this is possible, you should not use the
filesystem-list when using this option, See the -s option for serial file system check, you can also use -t option to specify a specific file system type.-R (root-skip) This option force fsck to skip root filesystem, if it is mounted as read-write.-N (no) This option respond automatically no to all questions it may appear so you get the analysis but no action is take-t filesystemtype (file system type) Here you can specify the file system type to be checked if combined with -A option
fsck will only check those File System listed in that file that are of the specified file sytem.
-s (serial) This option forces
fsck to do a serial and not parallel scanningSpecific to ext2 and ext3 file systems-f (force) This option forces
fsck to check a file system even if it is clean, as fsck skips by default clean file systems to do a quickly job The exit code returned by fsck is the sum of the following conditions:
0 - No errors
1 - File system errors corrected
2 - System should be rebooted
4 - File system errors left uncorrected
8 - Operational error
16 - Usage or syntax error
32 - Fsck canceled by user request
128 - Shared library error
You can run fsck in interactive or batch mode, if in interactive you will be prompted before it takes any action, if running in batch mode it will take the better action automatically. Use -r option to make
fsck run in interactive mode.
Also, this options makes
fsck runs in batch mode.
-a (automatic) Makes
fsck runs in batch mode-p (preen) Same as -a-y (yes) Opposite to -n, so it assumes yes to all questions that may appear
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