How to Run cron Jobs(Schduled jobs)

Question

HI all,
I am runnig one webapplication in resin.In resin web.xml run at tag like below
<run-at>01:50,03:50</run-at>This tag is used for runnig some periodic jobs.I want to cleanup the database every day at above mentiond timings.But in tomcat htere is no option like that.Is there any way to develope cron jobs please help me.
Thanks in advance

Answer 1

Do you have other tasks in cron?
I will assume not. You have to make sure you have permissions to do cronjobs.
If so, then just type crontab -e
From here you can use the following guideline to make your cronjob. Also source your .profile or whatever in your shell script.
Minute = Minute of the hour, 00 to 59. * Will indicate every minute (details later)
Hour = Hour of the day in 24-hour format, 00 to 23. * Will indicate every hour (details later)
Day = Day of the month, 1 to 31. * Will indicate every day (details later)
Month = Month of the year, 1 to 12. * Will indicate every month (details later)
Day = Day of the week, 3 chars - sun, mon, tue, or numeric (0=sun, 1=mon etc).... * Will indicate every day (details later)
Task = The command you want to execute
So if I had a shell script called runme.sh and in it it called my .profile (which sets my oracle_home and path etc) and it also called sqlplus and ran my script this is how I would set it up. Let's assume we want it to run 10 minutes after midnight every night.
10 0 * * * runme.sh
Let's assume you want a log, then it can look like this.
10 0 * * * runme.sh 1> path/filename.log 2> path/errorlog.err
If you wanted to just run it from Monday through Friday, then do this.
10 0 * * 1,2,3,4,5 runme.sh
Hope this helps.