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+.TH quotacheck 8 "Fri Jul 20 2001"
+.SH NAME
+quotacheck \- scan a filesystem for disk usage, create, check and repair quota files
+.SH SYNOPSIS
+.B quotacheck
+[
+.B \-gubcfinvdMmR
+] [
+.B \-F
+.I quota-format
+]
+.B \-a
+|
+.I filesystem
+.br
+.SH DESCRIPTION
+.B 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
+.B -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.
+.B quotacheck
+expects each filesystem to be checked to have quota files named
+.I [a]quota.user
+and
+.I [a]quota.group
+located at the root of the associated filesystem.  If a file is not
+present, 
+.B quotacheck
+will create it.
+.PP
+If the quota file is corrupted,
+.B quotacheck
+tries to save as much data as possible.  Rescuing data may need user
+intervention. With no additional options
+.B quotacheck
+will simply exit in such a situation. When in interactive mode (option
+.BR -i )
+, the user is asked for advice. Advice can also be provided from command
+line (see option
+.BR -n )
+, which is useful when
+.B quotacheck
+is run automatically (ie. from script) and failure is unacceptable.
+.PP
+.B quotacheck
+should be run each time the system boots and mounts non-valid filesystems.
+This is most likely to happen after a system crash.
+.PP
+It is strongly recommended to run
+.B 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
+.B quotacheck
+on a live filesystem as actual usage may change during the scan.  To
+prevent this,
+.B 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
+.BR \-m .
+You can also make
+.B quotacheck
+ignore the failure to remount the filesystem read-only with option
+.BR \-M .
+.SH OPTIONS
+.TP
+.B -b, --backup
+Forces
+.B quotacheck
+to make backups of the quota file before writing the new data.
+.TP
+.B -v, --verbose
+.B 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).
+.TP
+.B -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.
+.TP
+.B -u, --user
+Only user quotas listed in
+.I /etc/mtab
+or on the filesystems specified are to be checked.  This is the default action.
+.TP
+.B -g, --group
+Only group quotas listed in
+.I /etc/mtab
+or on the filesystems specified are to be checked.
+.TP
+.B -c, --create-files
+Don't read existing quota files. Just perform a new scan and save it to disk.
+.B quotacheck
+also skips scanning of old quota files when they are not found.
+.TP
+.B -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.
+.TP
+.B -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.
+.TP
+.B -m, --no-remount
+Don't try to remount filesystem read-only. See comment with option
+.BR \-M .
+.TP
+.B -i, --interactive
+Interactive mode. By default
+.B quotacheck
+exits when it finds an error. In interactive mode user is asked for
+input instead.  See option
+.BR \-n .
+.TP
+.B -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,
+.B 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).
+.TP
+.B -F, --format=\f2format-name\f1
+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:
+.B vfsold
+Original quota format with 16-bit UIDs / GIDs,
+.B vfsv0
+Quota format with 32-bit UIDs / GIDs, 64-bit space usage, 32-bit inode usage and limits,
+.B vfsv1
+Quota format with 64-bit quota limits and usage,
+.B rpc
+(quota over NFS),
+.B xfs
+(quota on XFS filesystem)
+.TP
+.B -a, --all
+Check all mounted non-NFS filesystems in
+.B /etc/mtab
+.TP
+.B -R, --exclude-root
+When used together with the
+.B \-a
+option, all filesystems except for the root filesystem are checked for
+quotas.
+
+.SH NOTE
+.B quotacheck
+should only be run by super-user. Non-privileged users are presumably
+not allowed to read all the directories on the given filesystem.
+
+.SH "SEE ALSO"
+.BR quota (1),
+.BR quotactl (2),
+.BR fstab (5),
+.BR quotaon (8),
+.BR repquota (8),
+.BR convertquota (8),
+.BR setquota (8),
+.BR edquota (8),
+.BR fsck (8),
+.BR efsck (8),
+.BR e2fsck (8),
+.BR xfsck (8)
+
+.SH FILES
+.PD 0
+.TP 15
+.B aquota.user or aquota.group
+located at filesystem root with quotas (version 2 quota, non-XFS
+filesystems)
+.TP 15
+.B quota.user or quota.group
+located at filesystem root with quotas (version 1 quota, non-XFS
+filesystems)
+.TP
+.B /etc/mtab
+names and locations of mounted filesystems
+.SH AUTHOR
+Jan Kara \<jack@suse.cz\>
+.br
+Based on old
+.B quotacheck
+by:
+.br
+Edvard Tuinder \<ed@elm.net\>
+.br
+Marco van Wieringen \<mvw@planets.elm.net\>