.SH SYNOPSIS
.B tune2fs
[
-.B -l
+.B \-l
]
[
-.B -c
+.B \-c
.I max-mount-counts
]
[
-.B -e
+.B \-e
.I errors-behavior
]
[
-.B -i
+.B \-i
.I interval-between-checks
]
[
-.B -m
+.B \-m
.I reserved-blocks-percentage
]
[
-.B -r
+.B \-r
.I reserved-blocks-count
]
[
-.B -s sparse-super-flag
+.B \-s
+.I sparse-super-flag
]
[
-.B -u
+.B \-u
.I user
]
[
-.B -g
+.B \-g
.I group
]
[
-.B -C
+.B \-C
.I mount-count
]
[
-.B -L
+.B \-L
.I volume-name
]
[
-.B -M
+.B \-M
.I last-mounted-directory
]
[
-.B -U
+.B \-O
+\fR[^]\fIfeature\fR[,...]
+]
+[
+.B \-U
.I UUID
]
device
.SH DESCRIPTION
.BI tune2fs
adjusts tunable filesystem parameters on a Linux second extended filesystem.
-.PP
-.B Never use tune2fs on a read/write mounted filesystem to change parameters!
-.PP
.SH OPTIONS
.TP
-.I -c max-mount-counts
+.BI \-c " max-mount-counts"
adjust the maximal mounts count between two filesystem checks.
.TP
-.I -e errors-behavior
+.BI \-e " error-behavior"
change the behavior of the kernel code when errors are detected.
-.I errors-behavior
-can be one of the followings:
+.I error-behavior
+can be one of the following:
.br
\ continue\ \ Continue normal execution.
.br
-\ remount-ro\ Remount the filesystem read-only.
+\ remount-ro\ Remount filesystem read-only.
.br
-\ panic\ \ Causes a kernel panic.
+\ panic\ \ Cause a kernel panic.
.TP
-.I -g group
+.BI \-g " group"
set the user group which can benefit from the reserved blocks.
.br
.I group
can be a numerical gid or a group name.
.TP
-.I -i interval-between-checks[d|m|w]
+.BI \-i " interval-between-checks\fR[\fBd\fR|\fBm\fR|\fBw\fR]"
adjust the maximal time between two filesystem checks.
-No postfix or `d' result in days, `m' in months, and `w' in weeks.
-A value of zero will disable the timedependent checking.
+No postfix or
+.B d
+result in days,
+.B m
+in months, and
+.B w
+in weeks. A value of zero will disable the timedependent checking.
.TP
-.I -l
+.B \-l
list the contents of the filesystem superblock.
.TP
-.I -m reserved-blocks-percentage
+.BI \-m " reserved-blocks-percentage"
adjust the reserved blocks percentage on the given device.
.TP
-.I -r reserved-blocks-count
+.BI \-r " reserved-blocks-count"
adjust the reserved blocks count on the given device.
.TP
-.I -s sparse_super_flag
-sets and resets the sparse_superblock flag. The sparse_superblock feature
+.BI \-s " sparse_super_flag"
+set or reset the sparse_superblock flag. The sparse_superblock feature
saves space on really big filesystems.
.B Warning:
The Linux 2.0 kernel does not properly support this feature. Neither do
all Linux 2.1 kernels; please don't use this unless you know what you're
doing!
.TP
-.I -u user
+.BI \-u " user"
set the user who can benefit from the reserved blocks.
.I user
can be a numerical uid or a user name.
-.IP
-.I -C mount-count
+.TP
+.BI \-C " mount-count"
set the number of times the filesystem has been mounted.
.TP
-.I -L volume-label
-set the volume label of the filesystem.
+.BI \-L " volume-label"
+set the volume label of the filesystem.
+Ext2 filesystem labels can be at most 16 characters long; if
+.I volume-label
+is longer than 16 characters,
+.B tune2fs
+will truncate it and print a warning message.
.TP
-.I -M last-mounted-directory
-set the last-mounted direcctory for the filesystem.
+.BI \-M " last-mounted-directory"
+set the last-mounted directory for the filesystem.
.TP
-.I -U UUID
+.BI \-O " \fR[^]\fIfeature\fR[,...]"
+set or clear the indicated filesystem features (options) in the filesystem.
+.I Feature
+can be one of the following supported filesystem options:
+.IR sparse_super ,
+which will cause the filesystem to use sparse superblocks, and
+.IR filetype ,
+which will cause the filesystem to store file type information in
+directory entries. After setting or clearing either filesystem feature,
+e2fsck must be run on the filesystem.
+.TP
+.BI \-U " UUID"
set the UUID of the filesystem. A sample UUID looks like this:
-"c1b9d5a2-f162-11cf-9ece-0020afc76f16". The uuid may also be "null",
-which will set the filesystem UUID to the null UUID. The uuid may also
-be "random", which will generate a new random UUID for the filesystem.
-.PP
+"c1b9d5a2-f162-11cf-9ece-0020afc76f16". The uuid may also be
+.IR null ,
+which will set the filesystem UUID to the null UUID. The uuid may also be
+.IR random ,
+which will generate a new random UUID for the filesystem.
.SH BUGS
-We didn't find any bugs yet. Perhaps there are bugs but it's unlikely.
-.PP
+We haven't found any bugs yet. Perhaps there are bugs but it's unlikely.
.SH WARNING
-.B Use this utility on your own risk. You're modifying filesystems.
+Never use tune2fs to change parameters of a read/write mounted filesystem!
+.B Use this utility
+.B at your own risk.
+You're modifying a filesystem!
.SH AUTHOR
.B tune2fs
-has been written by Remy Card <card@masi.ibp.fr>, the developer and maintainer
+was written by Remy Card <card@masi.ibp.fr>, the developer and maintainer
of the ext2 fs.
-.br
.B tune2fs
uses the ext2fs library written by Theodore Ts'o <tytso@mit.edu>.
-.br
This manual page was written by Christian Kuhtz <chk@data-hh.Hanse.DE>.
-.br
Timedependent checking was added by Uwe Ohse <uwe@tirka.gun.de>.
.SH AVAILABILITY
.B tune2fs
-is available for anonymous ftp from ftp.ibp.fr and tsx-11.mit.edu in
-/pub/linux/packages/ext2fs.
+is part of the e2fsprogs package and is available for anonymous
+ftp from tsx-11.mit.edu in /pub/linux/packages/ext2fs.
.SH SEE ALSO
.BR dumpe2fs (8),
.BR e2fsck (8),
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff