UNIX for Dummies Questions & Answers

On Ubuntu 10.04 LTS, I would like to know the best way to schedule myscript.sh to run at a specified time, please provide examples and specify things like does cron have to be running, how do I check if cron is running and all that. I have tried unsuccessfully in the past to run the AT command, and would like to see a real world example.

cron is how you will do it. as you do a crontab -e to edit the cron.
first do a man cron to see how to do the entries.
a line will look something like:

Code:

0 15 * * *  /usr/lib/ras/dumpcheck >/dev/null 2>&1
0,5,10,15,20,25,30,35,40,45,50,55 * * * * /usr/sbin/dumpctrl -k >/dev/null 2>/de v/null

the 1st one runs at 1500 hrs the second is running every 5 min