is a tool for manipulating filesystem quotas. Depending on the
commandline options given, it can set hard or soft limits on block and
inode usage, set and reset grace periods, for both users and (if your
system supports this) groups. The filesystem to set the quota on is
given as the first (and only) non-option element, and it is either the
block special file (i.e /dev/sda3) or the mount point (i.e. /home) for
Set user quotas
Set group quotas
are either the numerical ID of the user or group, or its
name in the
Set block quotas [default]
Set inode quotas
The -b and -i options are persistent -- they stay in effect until
they are overridden.
Only raise quotas, never lower. Makes sure you don't accidentally lower quotas for a user/group.
Set the system-wide grace period to TIME. TIME consists
of an optional '-' or '+' character, a number, and optionally
one of the following modifiers: "seconds", "minutes", "hours",
"days", "weeks", or "months". Unique abbreviations (e.g. "s",
"mo") are also accepted. The default is "seconds".
The argument should be preceded by -u|-g and -b|-i
Reset the grace period
Set hard limit to NUM
Set soft limit (quota) to NUM
NUM consists of an optional '-' or '+' character, a
number, and optionally one of the following modifiers:
"MB", "kB", "bytes", or "blocks". Unique abbreviations
are also accepted. The default is "blocks"
If +/- is supplied, the existing quota is
increased or reduced by the specified amount.
Dump quota info for user/group in a machine readable format:
|------- BLOCKS --------| |-------- FILES --------|
uid/gid mountpoint current quota limit grace current quota limit grace
is the number of seconds from now until the grace time ends. May be
negative = time already passed. When quota is not passed, grace is zero.
dry-run: show what would have been done but don't change anything.
Use together with -v
Verbose output. Use twice or thrice for even more output (debugging)
Print a usage message to stdout and exit successfully
Print version information to stdout and exit successfully
FILESYSTEMS / FORMATS
works with both "old" and "new" + "generic" kernel-quota formats and also has
support for quotas on XFS.
with more than one -v option will cause a segfault on some systems.
This will happen if vprintf (3) fails to check for NULL arguments.
GNU libc doesn't have this problem, solaris libc does.