Cron is the *nix program that runs scheduled tasks that are read from /etc/crontab. This guide will teach you how to make a scheduled process by using cron.
- Possible root access
Adding a task for cron to do is rather simple. Just edit the crontab with our task.
# crontab -u root -e
The -u flag tells crontab to tweak the following user’s crontab and the -e flag tells crontab to edit the file.
For this example, we will follow the format and update our ports tree every morning at 3am.
#minute hour mday month wday command with full path 0 3 * * * /usr/sbin/cvsup -g -L2 /etc/cvsupfile
Save and exit. Now your ports tree will be updated every morning.