quotaon (Linux command)

NAME
, - turn filesystem quotas on and off

SYNOPSIS

 * /usr/sbin/ filesystem ...
 * /usr/sbin/
 * /usr/sbin/  filesystem ...
 * /usr/sbin/

quotaon
announces to  the  system  that  disk quotas should be enabled on one or more filesystems. The filesystem quota files must be present in the root directory  of  the specified  filesystem  and  be  named  either  aquota.user  (for version 2 user quota), quota.user (for version 1 user quota), aquota.group (for version  2  group  quota),  or quota.group (for version 1 group quota).

XFS filesystems are  a  special  case – XFS considers quota information as filesystem metadata and uses journaling to provide a higher level guarantee of consistency. There are two  components  to  the  XFS disk quota system: accounting and limit enforcement. Except in the case of the root filesystem, XFS filesystems require that quota accounting be turned on at mount time. It is possible to enable and disable limit enforcement on any XFS filesystem after quota accounting is already turned on. The default is  to turn on both accounting and enforcement.

The XFS quota implementation does not maintain quota information in user-visible files, but rather stores this information internally.

quotaoff
announces to the system that the specified filesystems should have  any  disk quotas turned off.

XFS EXAMPLES

 * Turning on quotas on a non-root XFS filesystem:
 * Use (8) or /etc/fstab option quota to enable both accounting and  limit  enforcement.  quotaon utility cannot be used for this purpose.
 * Turning on quotas on an XFS root filesystem:
 * Use -v /, and (8).  This procedure will enable both accounting and limit enforcement.
 * Turning off quota limit enforcement on any XFS filesystem:
 * Make sure that quota accounting and enforcement are both turned on using  -s. Use  -vo to disable limit enforcement.  This may be done while the filesystem is mounted.
 * Turning on quota limit enforcement on any XFS filesystem:
 * Make sure that quota accounting is turned on using -s.  Use  -v. This may be done while the filesystem is mounted.

FILES

 * aquota.user or aquota.group:quota file  at  the  filesystem  root  (version  2  quota, non-XFS
 * quota.user or quota.group:quota file at  the  filesystem  root  (version  1  quota,  non-XFS filesystems)
 * /etc/fstab:default filesystems