topic Re: Simple crontab. in Operating System - HP-UX

Simple crontab.

Jeff Martin_3 — Mon, 16 Jun 2003 15:27:07 GMT

How do I schedule a job to run every minute of every hour of every day?

Is it ?

* * * * * /runcommand

Re: Simple crontab.

James R. Ferguson — Mon, 16 Jun 2003 15:31:13 GMT

Hi Jeff:

The fields of a 'ctontab' entry are:

minute hour monthday month weekday command

Hence, to run 'mycommand' every minute of every hour of every day, do:

* * * * * mything

See the man pages for 'crontab' for more information.

Regards!

...JRF...

Re: Simple crontab.

James R. Ferguson — Mon, 16 Jun 2003 15:31:49 GMT

Re: Simple crontab.

Umapathy S — Mon, 16 Jun 2003 15:33:36 GMT

hi Jeff,

* * * * * /runcommand

Will do the work.

HTH,
Umapathy

Re: Simple crontab.

Jim Mallett — Mon, 16 Jun 2003 15:34:55 GMT

Yes, that syntax is right.

The entries in a crontab file are lines of six fields each. The fields are separated by spaces or tabs. The lines have the following format:
minute hour monthday month weekday command
* * * * * /command

See: man crontab for more.

Re: Simple crontab.

Jose Mosquera — Mon, 16 Jun 2003 15:36:09 GMT

yeap!

Remember include in /var/adm/cron/cron.allow file the user that must start this job!

Rgds.

Re: Simple crontab.

Bill Hassell — Mon, 16 Jun 2003 23:53:36 GMT

Since the job is running every minute, there may be a possibility that your job may run longer than 1 minute, so be sure the job won't get confused when older copies are still running. If this job could ever get hung up (for instance, bdf might hang with a bad NFS server), you could easily get hundreds of processes taking up process slots and create a problem when nproc is exceeded. Since no one is there to make sure things run correctly every minute, add code to your job to use timeouts or other tests.