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-rw-r--r-- | usr.sbin/cron/crontab/crontab.5 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/usr.sbin/cron/crontab/crontab.5 b/usr.sbin/cron/crontab/crontab.5 index b9953ad..01f6207 100644 --- a/usr.sbin/cron/crontab/crontab.5 +++ b/usr.sbin/cron/crontab/crontab.5 @@ -55,6 +55,10 @@ The .Em value string may be placed in quotes (single or double, but matching) to preserve leading or trailing blanks. +The +.Em name +string may also be placed in quote (single or double, but matching) +to preserve leading, traling or inner blanks. .Pp Several environment variables are set up automatically by the @@ -182,6 +186,21 @@ field matches the current time. For example, ``30 4 1,15 * 5'' would cause a command to be run at 4:30 am on the 1st and 15th of each month, plus every Friday. +.Pp +Instead of the first five fields, +one of eight special strings may appear: +.Bd -literal -offset indent +string meaning +------ ------- +@reboot Run once, at startup. +@yearly Run once a year, "0 0 1 1 *". +@annually (sames as @yearly) +@monthly Run once a month, "0 0 1 * *". +@weekly Run once a week, "0 0 * * 0". +@daily Run once a day, "0 0 * * *". +@midnight (same as @daily) +@hourly Run once an hour, "0 * * * *". +.Ed .Sh EXAMPLE CRON FILE .Bd -literal @@ -221,6 +240,11 @@ Command output is mailed to the crontab owner (BSD can't do this), can be mailed to a person other than the crontab owner (SysV can't do this), or the feature can be turned off and no mail will be sent at all (SysV can't do this either). +.Pp +All of the +.Sq @ +commands that can appear in place of the first five fields +are extensions. .Sh AUTHORS .An Paul Vixie Aq paul@vix.com .Sh BUGS |