Crontab : HP-UX

Many times admins forget the field order of the crontab file
and alway reference the man pages over-and-over.

Make your life easy. Just put the field definitions in your crontab file
and comment (#) the lines out so the crontab file ignores it.

# minute (0-59),
# | hour (0-23),
# | | day of the month (1-31),
# | | | month of the year (1-12),
# | | | | day of the week (0-6 with 0=Sunday).
# | | | | | commands
3 2 * * 0,6 /some/command/to/run
3 2 * * 1-5 /another/command/to/run

export EDITOR=vi ;to specify a editor to open crontab file.

crontab -e Edit your crontab file, or create one if it doesn't already exist.
crontab -l Display your crontab file.
crontab -r Remove your crontab file.
crontab -v Display the last time you edited your crontab file. (This option is only available on a few systems.)


Here are some examples.

0 0 * * * -- midnight every day
0 0 * * 1-5 -- midnight every weekday
0 0 1,15 * * -- midnight on 1st and 15th of month
0 0 1 * 5 -- midnight on 1st of month and every Friday

Crontab example:

A line in crontab file like below removes the tmp files from /home/someuser/tmp each day at 6:30 PM.

30 18 * * * rm /home/someuser/tmp/*

Cheers !!!