Scheduled tasks

[Manuales]

Hi ..
could you please let me know how many ways there are in unix to schedule tasks?
i know cron...

could you explain me about "at" commmand?

is there other way to schedule tasks?

thanks in advance.

[James R. Ferguson · Accepted solution]

Hi Manuales:

You can create 'crontasks' and do 'at' or 'batch' jobs. The manpages for 'at' (of which 'batch' is really just another queue) offer explanations of usage.

Like 'cron', you need to pay attention to the 'at.allow' and 'at.deny' files. This too is documented in your friendly manpages :-)

Regards!

...JRF...

[Patrick Wallek]

There are also third party schedulers available, which you have to pay for.

Two products I can think of right off: IBM Tivoli Workload Scheduler (was Maestro many years ago) and Autosys.

[Pete Randall]

The at command is basically a one-time version of cron. It uses cron's facilities to schedule a job to be run at some time in the future. You can even make it replicate cron's functionality by using at to schedule a script that then re-schedules the same script, like this:

echo "/full_path_to_myscript" | at 02:00 tomorrow

Put that at the end of your script and it will recur tomorrow!

More info, as always, can be found in the man page for at.


Pete