mirror of https://github.com/vitalif/e2fsprogs
155 lines
3.3 KiB
Groff
155 lines
3.3 KiB
Groff
.\" Revision 1.0 93/06/3 23:00 chk
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.\" Initial revision
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.\"
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.\"
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.TH TUNE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
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.SH NAME
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tune2fs \- adjust tunable filesystem parameters on second extended filesystems
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.SH SYNOPSIS
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.B tune2fs
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[
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.B -l
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]
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[
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.B -c
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.I max-mount-counts
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]
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[
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.B -e
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.I errors-behavior
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]
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[
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.B -i
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.I interval-between-checks
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]
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[
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.B -m
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.I reserved-blocks-percentage
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]
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[
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.B -r
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.I reserved-blocks-count
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]
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[
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.B -s sparse-super-flag
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]
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[
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.B -u
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.I user
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]
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[
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.B -g
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.I group
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]
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[
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.B -C
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.I mount-count
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]
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[
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.B -L
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.I volume-name
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]
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[
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.B -M
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.I last-mounted-directory
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]
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[
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.B -U
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.I UUID
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]
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device
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.SH DESCRIPTION
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.BI tune2fs
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adjusts tunable filesystem parameters on a Linux second extended filesystem.
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.PP
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.B Never use tune2fs to change parameters of a read/write mounted filesystem!
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.PP
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.SH OPTIONS
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.TP
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.I -c max-mount-counts
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adjust the maximal mounts count between two filesystem checks.
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.TP
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.I -e error-behavior
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change the behavior of the kernel code when errors are detected.
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.I error-behavior
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can be one of the following:
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.br
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\ continue\ \ Continue normal execution.
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.br
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\ remount-ro\ Remount the filesystem read-only.
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.br
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\ panic\ \ Cause a kernel panic.
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.TP
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.I -g group
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set the user group which can benefit from the reserved blocks.
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.br
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.I group
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can be a numerical gid or a group name.
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.TP
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.I -i interval-between-checks[d|m|w]
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adjust the maximal time between two filesystem checks.
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No postfix or `d' result in days, `m' in months, and `w' in weeks.
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A value of zero will disable the timedependent checking.
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.TP
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.I -l
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list the contents of the filesystem superblock.
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.TP
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.I -m reserved-blocks-percentage
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adjust the reserved blocks percentage on the given device.
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.TP
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.I -r reserved-blocks-count
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adjust the reserved blocks count on the given device.
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.TP
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.I -s sparse_super_flag
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set or reset the sparse_superblock flag. The sparse_superblock feature
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saves space on really big filesystems.
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.B Warning:
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The Linux 2.0 kernel does not properly support this feature. Neither do
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all Linux 2.1 kernels; please don't use this unless you know what you're
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doing!
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.TP
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.I -u user
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set the user who can benefit from the reserved blocks.
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.I user
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can be a numerical uid or a user name.
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.IP
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.I -C mount-count
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set the number of times the filesystem has been mounted.
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.TP
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.I -L volume-label
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set the volume label of the filesystem.
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.TP
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.I -M last-mounted-directory
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set the last-mounted directory for the filesystem.
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.TP
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.I -U UUID
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set the UUID of the filesystem. A sample UUID looks like this:
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"c1b9d5a2-f162-11cf-9ece-0020afc76f16". The uuid may also be "null",
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which will set the filesystem UUID to the null UUID. The uuid may also
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be "random", which will generate a new random UUID for the filesystem.
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.PP
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.SH BUGS
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We haven't found any bugs yet. Perhaps there are bugs but it's unlikely.
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.PP
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.SH WARNING
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.B Use this utility at your own risk. You're modifying a filesystem!
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.SH AUTHOR
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.B tune2fs
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was written by Remy Card <card@masi.ibp.fr>, the developer and maintainer
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of the ext2 fs.
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.br
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.B tune2fs
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uses the ext2fs library written by Theodore Ts'o <tytso@mit.edu>.
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.br
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This manual page was written by Christian Kuhtz <chk@data-hh.Hanse.DE>.
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.br
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Timedependent checking was added by Uwe Ohse <uwe@tirka.gun.de>.
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.SH AVAILABILITY
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.B tune2fs
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is available for anonymous ftp from ftp.ibp.fr and tsx-11.mit.edu in
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/pub/linux/packages/ext2fs.
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.SH SEE ALSO
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.BR dumpe2fs (8),
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.BR e2fsck (8),
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.BR mke2fs (8)
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