NOTE THAT THIS SECTION ONLY APPLIES IF THE
crontab PROGRAMS HAVE BEEN INSTALLED BY THE
If the program runs by the name of
it will read all the files in
/var/cron/tabs (which should only
be readable by root) and the file
/etc/crontab, and then
detaches itself from the terminal to live forever as a daemon
process. Additionally, it creates a UNIX socket at
/var/cron/socket, and listens for messages sent to that socket
consisting of a user name whose crontabs have been changed. In this
case, the program will re-read that user's crontab. This is for
correct functioning with the crontab program.
Further, if the
--noetc option was not used, a job is scheduled
to run every minute to check if /etc/crontab has been modified
recently. If so, this file will also be re-read.
The options which may be used with this program are as follows.
The count, if supplied, indicates the number of commands to display. The default value is 8.
/etc/crontab. It is recommended that this option be used (and further that the
/etc/crontabfile be taken off the system altogether!)