Jeffrey Cao wrote:
Is there an option in CRON, which always check if CRON has started the =
process and is already running? Cron should execute the script only if =
the the process isn't running already. Any hints on this?
You could create a lockfile
   touch /var/lock/cronfiletest
and the test if this lockfile exists, or else exit
   test -f /var/lock/cronfiletest || exit 0
Should it be this?
    test -f /var/lock/cronfiletest && exit 0
if you want to exit when the lock file exist.
Yes, of course. You're absolutely right.

Sjoerd

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