60 lines
1.3 KiB
Groff
60 lines
1.3 KiB
Groff
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CRON(8) Minix Programmer's Manual CRON(8)
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NAME
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cron - clock daemon
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SYNOPSIS
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cron
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EXAMPLES
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/usr/bin/cron # Use absolute path in /etc/rc
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DESCRIPTION
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Cron is clock daemon. It is typically started up by including the
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command /usr/bin/cron in the /etc/rc file. Once started, cron puts itself
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in the background, so no & is needed. It runs forever, sleeping most of
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the time. Once a minute it wakes up and examines /usr/lib/crontab to see
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if there is any work to do. If there is, the work is done. The entries
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of /usr/lib/crontab contain 6 elements each. Some examples follow:
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Min Hr Dat Mo Day Command
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* * * * * /usr/bin/date >/dev/log #print date every minute
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0 * * * * /usr/bin/date >/dev/log #print date on the hour
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30 4 * * 1-5 /bin/backup /dev/fd1 #do backup Mon-Fri at 0430
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30 19 * * 1,3,5 /etc/backup /dev/fd1 #Mon, Wed, Fri at 1930
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0 9 25 12 * /usr/bin/sing >/dev/log #Xmas morning at 0900 only
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SEE ALSO
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at(1).
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1
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