1 .\" Revision 1.0 93/06/3 23:00 chk
5 .TH TUNE2FS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
7 tune2fs \- adjust tunable filesystem parameters on second extended filesystems
23 .I interval-between-checks
27 .I reserved-blocks-percentage
31 .I reserved-blocks-count
51 .I last-mounted-directory
60 adjusts tunable filesystem parameters on a Linux second extended filesystem.
62 .B Never use tune2fs on a read/write mounted filesystem to change parameters!
66 .I -c max-mount-counts
67 adjust the maximal mounts count between two filesystem checks.
70 change the behavior of the kernel code when errors are detected.
72 can be one of the followings:
74 \ continue\ \ Continue normal execution.
76 \ remount-ro\ Remount the filesystem read-only.
78 \ panic\ \ Causes a kernel panic.
81 set the user group which can benefit from the reserved blocks.
84 can be a numerical gid or a group name.
86 .I -i interval-between-checks[d|m|w]
87 adjust the maximal time between two filesystem checks.
88 No postfix or `d' result in days, `m' in months, and `w' in weeks.
89 A value of zero will disable the timedependent checking.
92 list the contents of the filesystem superblock.
94 .I -m reserved-blocks-percentage
95 adjust the reserved blocks percentage on the given device.
97 .I -r reserved-blocks-count
98 adjust the reserved blocks count on the given device.
101 set the user who can benefit from the reserved blocks.
103 can be a numerical uid or a user name.
106 set the number of times the filesystem has been mounted.
109 set the volume label of the filesystem.
111 .I -M last-mounted-directory
112 set the last-mounted direcctory for the filesystem.
115 set the UUID of the filesystem. A sample UUID looks like this:
116 "c1b9d5a2-f162-11cf-9ece-0020afc76f16". The uuid may also be "null",
117 which will set the filesystem UUID to the null UUID. The uuid may also
118 be "random", which will generate a new random UUID for the filesystem.
121 We didn't find any bugs yet. Perhaps there are bugs but it's unlikely.
124 .B Use this utility on your own risk. You're modifying filesystems.
127 has been written by Remy Card <card@masi.ibp.fr>, the developer and maintainer
131 uses the ext2fs library written by Theodore Ts'o <tytso@mit.edu>.
133 This manual page was written by Christian Kuhtz <chk@data-hh.Hanse.DE>.
135 Timedependent checking was added by Uwe Ohse <uwe@tirka.gun.de>.
138 is available for anonymous ftp from ftp.ibp.fr and tsx-11.mit.edu in
139 /pub/linux/packages/ext2fs.