Provided by: quota_4.04-2ubuntu0.1_amd64 bug


       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
       omitted  if  option  -c is specified). 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] 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 additional 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 unacceptable.

       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, --backup
              Forces quotacheck to make backups of the quota file before writing the new data.

       -v, --verbose
              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, --debug
              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, --user
              Only user quotas listed in /etc/mtab or on the  filesystems  specified  are  to  be
              checked.  This is the default action.

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

       -c, --create-files
              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, --force
              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, --try-remount
              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, --no-remount
              Don't try to remount filesystem read-only. See comment with option -M.

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

       -n, --use-first-dquot
              If the quota files become corrupted, it is possible for  duplicate  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=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 Original quota format with 16-bit UIDs /
              GIDs, vfsv0 Quota format with 32-bit UIDs / GIDs, 64-bit space usage, 32-bit  inode
              usage and limits, vfsv1 Quota format with 64-bit quota limits and usage, rpc (quota
              over NFS), xfs (quota on XFS filesystem)

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

       -R, --exclude-root
              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 filesystem.


       quota(1), quotactl(2), fstab(5), quotaon(8),  repquota(8),  convertquota(8),  setquota(8),
       edquota(8), fsck(8), efsck(8), e2fsck(8), xfsck(8)


       aquota.user or
                      located   at   filesystem  root  with  quotas  (version  2  quota,  non-XFS
       quota.user or
                      located  at  filesystem  root  with  quotas  (version  1   quota,   non-XFS
       /etc/mtab      names and locations of mounted filesystems


       Jan Kara <>
       Based on old quotacheck by:
       Edvard Tuinder <>
       Marco van Wieringen <>

                                         Fri Jul 20 2001                            quotacheck(8)