periodic system maintenance
The three files /etc/daily
, and /etc/monthly
are shell scripts run on a periodic basis by the clock daemon,
. 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
These scripts should not be altered. Local additions should be
made to the files /etc/daily.local,
/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:
This script is run weekly. It currently does the following:
- Runs the script /etc/daily.local, if it
- Removes scratch and junk files from /tmp.
- Purges accounting records from /var/account, if
they exist. Processes that were killed due to pledge or memory access
violations are reported in the daily mail. See
- Creates a backup root file system which is updated daily. This only
happens if the following conditions are met:
- The environment variable
ROOTBACKUP must be
set. For example, the following can be added to
- 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
- Checks daemon status. Lists any daemons which are enabled in
rc.conf.local(8) but which are
not actually running.
- 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 networking statistics via
- Runs the calendar(1) utility unless
the environment variable
CALENDAR is set to 0 in
/etc/daily.local or the host is a
CHECKFILESYSTEMS is set to 1 in
fsck(8) with the no-write flag
- If the file /etc/Distfile exists, runs the
- Runs the system security(8) check
This script is run monthly. It currently does the following:
- Runs the script /etc/weekly.local, if it
- Rebuilds the locate(1) database, if
there is an existing /var/db/locate.database
- Rebuilds the whatis(1) database(s) via
LOGINACCOUNTING is set to 1 in
/etc/weekly.local and the
/var/log/wtmp file exists, show individual users'
login via the ac(8) utility.
- Runs the script /etc/monthly.local, if it
- 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).
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
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.