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           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] 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, --backup
                  Forces quotacheck to make backups of the quota file before writ-
                  ing 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.
           -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  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=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
           -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


           quota(1),  quotactl(2),   fstab(5),   quotaon(8),   repquota(8),   con-
           Based on old quotacheck by:
           Edvard Tuinder <>
           Marco van Wieringen <>
                                    Fri Jul 20 2001                  quotacheck(8)

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