periodic system maintenance
The three files /etc/daily, /etc/weekly, and /etc/monthly are shell scripts run on a periodic basis by the clock daemon, cron(8). They take care of some basic administrative tasks. Their output, if any, is mailed to root.
Note: The scripts are all run as part of root's crontab(5). However, it is strongly suggested that the root mail account be an alias that forwards messages to a real user or set of users. Otherwise, root's mail will simply accumulate in /var/mail until the partition holding it runs out of space. See newaliases(8) for further details.
These scripts should not be altered. Local additions should be made to the files /etc/daily.local, /etc/weekly.local, and /etc/monthly.local, which will be executed by /etc/daily, /etc/weekly, and /etc/monthly, respectively. The *.local files are executed first, which makes it convenient to do any necessary cleanup and backup and to define any required shell variables before the script is run.
This script is run daily. It currently does the following:
- Runs the script /etc/daily.local, if it exists.
- Removes scratch and junk files from /tmp.
- Purges accounting records from /var/account, if they exist. See accton(8) and sa(8).
- Creates a backup root file system which is updated daily. This only
happens if the following conditions are met:
- The environment variable
ROOTBACKUPmust be set. For example, the following can be added to /etc/daily.local:
- The mount directory /altroot must exist, and
there must be an /etc/fstab entry specifying a
configured disk device, the file system type ‘ffs’, and
‘xx’ for the mount options, e.g.
/dev/wd0j /altroot ffs xx 0 0
- The environment variable
- Checks disk status. Reports on the amount of disk used/available via df(1). Reports on which file systems need to be dumped via dump(8).
- Reports on the status of the mail queue via mailq(8).
- Reports networking statistics via netstat(1).
- Runs the
calendar(1) utility unless the environment variable
CALENDARis set to 0 in /etc/daily.local or the host is a yp(8) client.
CHECKFILESYSTEMSis set to 1 in /etc/daily.local, runs fsck(8) with the no-write flag (
- If the file /etc/Distfile exists, runs the rdist(1) utility.
- Runs the system security(8) check script.
This script is run weekly. It currently does the following:
- Runs the script /etc/weekly.local, if it exists.
- Rebuilds the locate(1) database, if there is an existing /var/db/locate.database file.
- Rebuilds the whatis(1) database(s) via makewhatis(8).
LOGINACCOUNTINGis set to 1 in /etc/weekly.local and the /var/log/wtmp file exists, show individual users' login via the ac(8) utility.
This script is run monthly. It currently does the following:
- Runs the script /etc/monthly.local, if it exists.
The following variables can be set in /etc/daily.local:
- If set to 0, do not run calendar(1).
- If set to 1, run fsck(8) with the no-write flag.
- If set to 1, make a backup of the root file system.
- If set to 0, df(1), dump(8), and netstat(1) are skipped. Consequently, if none of the other commands produce any output, no mail will be sent to root.
The following variables can be set in /etc/weekly.local:
- If set to 1, run ac(8) to report login accounting.
- If set to a string containing at least one character (even a blank), use
that string as the arguments to
makewhatis(8). If unset or empty, use the default argument
- Daily maintenance script.
- Site specific daily maintenance script.
- Weekly maintenance script.
- Site specific weekly maintenance script.
- Monthly maintenance script.
- Site specific monthly maintenance script.
- Root crontab(5).
calendar(1), crontab(1), df(1), locate(1), netstat(1), rdist(1), whatis(1), crontab(5), ac(8), accton(8), cron(8), dump(8), fsck(8), mailq(8), makewhatis(8), sa(8), security(8), yp(8)
monthly scripts first appeared in
4.3BSD-Reno. This manual page first appeared in
If the host machine is not running 24/7, these scripts may never be run. Adjusting the time fields in the system crontab(5) may partially alleviate this problem.
Be careful when adding local additions. Services such as "www" have their own users, and should be run as such, not as root. It may be more appropriate to create a separate crontab(5) for such services.