| .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\> |
