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quotacheck(8)							 quotacheck(8)

       quotacheck - scan a filesystem for disk usage, create, check and repair
       quota files

       quotacheck [ -gubcfinvdMmR ] [ -F quota-format ] -a | filesystem

       quotacheck examines each filesystem, builds a  table  of	 current  disk
       usage,  and compares this table against that recorded in the disk quota
       file for the filesystem (this step is ommitted if option -c  is	speci-
       fied). If any inconsistencies are detected, both the quota file and the
       current system copy of the incorrect quotas  are	 updated  (the	latter
       only  occurs  if an active filesystem is checked which is not advised).
       By default, only user quotas  are  checked.   quotacheck	 expects  each
       filesystem  to  be  checked to have quota files named [a]quota.user and
       [a]quota.group located at the root of the associated filesystem.	 If  a
       file is not present, quotacheck will create it.

       If  the	quota file is corrupted, quotacheck tries to save as much data
       as possible.  Rescuing data may need user intervention. With  no	 addi-
       tional options quotacheck will simply exit in such a situation. When in
       interactive mode (option -i) , the user is asked for advice. Advice can
       also  be	 provided  from command line (see option -n) , which is useful
       when quotacheck is run automatically (ie. from script) and  failure  is

       quotacheck  should  be  run  each time the system boots and mounts non-
       valid filesystems.  This is most likely to happen after a system crash.

       It is strongly recommended to run quotacheck with quotas turned off for
       the filesystem. Otherwise, possible damage or loss to data in the quota
       files  can  result.   It	 is  also  unwise  to run quotacheck on a live
       filesystem as actual usage may change  during  the  scan.   To  prevent
       this,  quotacheck  tries	 to  remount  the  filesystem read-only before
       starting the scan.  After the scan is done it remounts  the  filesystem
       read-write.  You	 can  disable  this with option -m.  You can also make
       quotacheck ignore the failure to remount the filesystem read-only  with
       option -M.

       -b     Forces quotacheck to make backups of the quota file before writ-
	      ing the new data.

       -v     quotacheck reports its operation as it progresses.  Normally  it
	      operates	silently.   If the option is specified twice, also the
	      current directory is printed (note that printing can  slow  down
	      the scan measurably).

       -d     Enable  debugging	 mode.	It will result in a lot of information
	      which can be used in debugging the program. The output  is  very
	      verbose and the scan will be slow.

       -u     Only user quotas listed in /etc/mtab or on the filesystems spec-
	      ified are to be checked.	This is the default action.

       -g     Only group quotas listed in  /etc/mtab  or  on  the  filesystems
	      specified are to be checked.

       -c     Don't  read  existing  quota  files. Just perform a new scan and
	      save it to disk.	quotacheck also skips scanning	of  old	 quota
	      files when they are not found.

       -f     Forces  checking	and  writing of new quota files on filesystems
	      with quotas enabled. This is  not	 recommended  as  the  created
	      quota files may be out of sync.

       -M     This  flag forces checking of filesystem in read-write mode if a
	      remount fails. Do this only when you are sure  no	 process  will
	      write to a filesystem while scanning.

       -m     Don't  try  to  remount  filesystem  read-only. See comment with
	      option -M.

       -i     Interactive mode. By default quotacheck exits when it  finds  an
	      error. In interactive mode user is asked for input instead.  See
	      option -n.

       -n     If the quota files become corrupted, it is possible  for	dupli-
	      cate  entries  for a single user or group ID to exist.  Normally
	      in this case, quotacheck exits or asks user for input. When this
	      option is set, the first entry found is always used (this option
	      works in interactive mode too).

       -F format-name
	      Check and fix quota files of specified format (ie. don't perform
	      format  auto-detection).	This is recommended as detection might
	      not work well on corrupted quota files.  Possible	 format	 names
	      are:  vfsold  (version  1	 quota),  vfsv0 (version 2 quota), rpc
	      (quota over NFS), xfs (quota on XFS filesystem)

       -a     Check all mounted non-NFS filesystems in /etc/mtab

       -R     When used together with the -a option,  all  filesystems	except
	      for the root filesystem are checked for quotas.

       quotacheck  should  only be run by super-user. Non-privileged users are
       presumably not allowed  to  read	 all  the  directories	on  the	 given

       quota(1),   quotactl(2),	  fstab(5),   quotaon(8),   repquota(8),  con-
       vertquota(8), setquota(8), edquota(8),  fsck(8),	 efsck(8),  e2fsck(8),

       aquota.user or aquota.group
		      located at filesystem root with quotas (version 2 quota,
		      non-XFS filesystems)
       quota.user or quota.group
		      located at filesystem root with quotas (version 1 quota,
		      non-XFS filesystems)
       /etc/mtab      names and locations of mounted filesystems
       Jan Kara <jack@suse.cz>
       Based on old quotacheck by:
       Edvard Tuinder <ed@elm.net>
       Marco van Wieringen <mvw@planets.elm.net>

				Fri Jul 20 2001			 quotacheck(8)
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