Linux e2fsck command

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Linux e2fsck command is used to check the file system using Linux ext2 Whether the partition of the file system is working normally.

Syntax

e2fsck [-pacnydfvFV] [-b superblock] [-B blocksize] [-l|-L bad_blocks_file] [-C fd] device

Parameter description:

• device : The hard disk partition to be pre-checked, for example:/dev/sda1
• -a : Check the partition, automatically repair if there is a problem, equivalent to -The function of p
• -b : Set the position where the superblock is stored
• -B : Set the size of the unit block
• -c : Check if the partition has bad tracks
• -C file : Save the check results to file for review
• -d : Print e2Debug results of fsck
• -f : Force check
• -F : Clear the device's buffer cache before starting the check to avoid errors
• -l bad_blocks_file : Add the bad track block information to bad_blocks_file
• -L bad_blocks_file : Set the bad track block information to bad_blocks_file, if there is no file, it will be automatically generated
• -n : Open the file system in [Read-only] mode
• -p : Check the partition, and automatically repair if there are problems
• -v : Detailed display mode
• -V : Display the current e2Version of fsck
• -y : Pre-set all the questions to be answered[Yes] during the check

Online Examples

Check /dev/hda5 Is it normal, if there is an exception, it will be automatically repaired, and if there are questions, all answer[Yes] :

e2fsck -a -y /dev/hda5

Note :

Mostly use e2Perform an fsck check on the hard disk partition, it is usually a special situation, so it is best to unmount the partition first, then execute e2Perform an fsck check, if necessary. / If so, please enter singal user mode and then execute.

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