0 Setting up a cronjob

I have added my script in folder : /etc/cron.hourly/

sudo touch system_stats

To make script executable:

chmod +x system_stats

sudo crontab -e   to add job to list.

Add folowing line, to run your script every hour.

*/1 * * * *  root  /etc/cron.hourly/system_stats

Ctrl + O

Ctrl + X

To check crontab list of jobs use :

crontab –l

You should see your recently added job.

Run cronjob by hand :
run-parts /etc/cron.hourly

Special note :

! Giving your cronjob script an extension will make it invalid and result in the job not being run.

     This mean , that if your script has name :   system_stats.sh    it won’t run.