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Title: man page e2fsck

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man page e2fsck

When you have problems with the filesystem, the man pages of e2fsck usually cannot be accessed anymore. That's why they are printed below. In order to execute e2fsck you need a bootdisk with this program (e.g. the rescue disk). E2FSCK(8) E2FSCK(8) NAME e2fsck - check a Linux second extended file system SYNOPSIS e2fsck [ -pacnyrdfvtFV ] [ -b superblock ] [ -B blocksize ] [ -l|-L bad_blocks_file ] device DESCRIPTION e2fsck is used to check a Linux second extended file sys­ tem. device is the special file corresponding to the device (e.g /dev/hdXX). OPTIONS -a This option does the same thing as the -p option. It is provided for backwards compatibility only; it is suggested that people use -p option whever pos­ sible. -b superblock Instead of using the normal superblock, use the alternative superblock specified by superblock. -B blocksize Normally, e2fsck will search for the superblock at various different block sizes in an attempt to find the appropriate block size. This search can be fooled in some cases. This option forces e2fsck to only try locating the superblock at a particular blocksize. If the superblock is not found, e2fsck will terminate with a fatal error. -c This option causes e2fsck to run the badblocks(8) program to find any blocks which are bad on the filesystem, and then marks them as bad by adding them to the bad block inode. -d Print debugging output (useless unless you are debugging e2fsck ). -f Force checking even if the file system seems clean. -F Flush the filesystem device's buffer caches before beginning. Only really useful for doing e2fsck time trials. -l filename Add the blocks listed in the file specified by filename to the list of bad blocks. -L filename Set the bad blocks list to be the list of blocks specified by filename. (This option is the same as the -l option, except the bad blocks list is cleared before the blocks listed in the file are added to the bad blocks list.) -n Open the filesystem read-only, and assume an answer of ``no'' to all questions. Allows e2fsck to be used non-interactively. (Note: if the -c, -l, or -L options are specified in addition to the -n option, then the filesystem will be opened read- write, to permit the bad-blocks list to be updated. However, no other changes will be made to the filesystem.) -p Automatically repair ("preen") the file system without any questions. -r This option does nothing at all; it is provided only for backwards compatibility. -t Print timing statistics for e2fsck. If this option is used twice, additional timing statistics are printed on a pass by pass basis. -v Verbose mode. -V Print version information and exit. -y Assume an answer of ``yes'' to all questions; allows e2fsck to be used non-interactively. EXIT CODE The exit code returned by e2fsck is the sum of the follow­ ing conditions: 0 - No errors 1 - File system errors corrected 2 - File system errors corrected, system should be rebooted if file system was mounted 4 - File system errors left uncorrected 8 - Operational error 16 - Usage or syntax error 128 - Shared library error BUGS Almost any piece of software will have bugs. If you man­ age to find a filesystem which causes e2fsck to crash, or which e2fsck is unable to repair, please report it to the author. Please include as much information as possible in your bug report. Ideally, include a complete transcript of the e2fsck run, so I can see exactly what error messages are displayed. If you have a writeable filesystem where the transcript can be stored, the script(1) program is a handy way to save the output of to a file. It is also useful to send the output of dumpe2fs(8). If a specific inode or inodes seems to be giving e2fsck trou­ ble, try running the debugfs(8) command and send the out­ put of the stat command run on the relevant inode(s). If the inode is a directory, the debugfs dump command will allow you to extract the contents of the directory inode, which can sent to me after being first run through uuen­ code(1). Always include the full version string which e2fsck dis­ plays when it is run, so I know which version you are run­ ning. AUTHOR This version of e2fsck is written by Theodore Ts'o . SEE ALSO mke2fs(8), tune2fs(8), dumpe2fs(8), debugfs(8) With the option -b it is possible to specify the superblock :
1, 8193, 16385 etc.

This is necessary if the superblock of the filesystem is broken. A redundant copy of the superblock is stored every 8192 blocks. Sometimes this is the only chance to recover from a filesystem crash.

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See also:

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Keywords: E2FSCK, BOOT, CHECK, CRASH

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Categories: Documentation

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Mainpage o Searchform o History o Versions o Categories o Contents
Deutsch

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SDB-e2fsck, Copyright SuSE GmbH, Nuremberg, Germany - Version: 13. Mar 1998
SuSE GmbH - Last generated: 07. Oct 1999 16:38:50 by maddin with sdb_gen 1.00.0