In order to run a task triggered by a timestamp, there must be some daemon running in the background of the server to start the task. The standard Unix daemons for this are crond and atd. Typically, both give ordinary users the ability to add things to the schedule. (the crontab command and the at command) If this has been disabled by the sysadmin, your remaining options are to run a daemon of your own detached from the terminal, or to schedule something on a different server that uses ssh with a authorized key to log in and run the task.

The perl modules mentioned above let you write a script which could either be a daemon on the server, or a daemon or foreground process somewhere else that calls ssh to the server. You could also take these approaches without using perl by running your own copy of crond.

The recommendation to ask the sysadmin why they disallowed access to Cron and whether they are ok with users running daemons on the server still applies.

In reply to Re^2: Crontab replacement in Perl by Anonymous Monk
in thread Crontab replacement in Perl by Anonymous Monk

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