Editing the crontab
sudo crontab -e
Will ask you what editor you want to use
Select an editor. To change later, run 'select-editor'. 1. /usr/bin/ne 2. /usr/bin/vim.basic 3. /usr/bin/vim.tiny
Next is to add your cron job to the file
The cron job runs in a certain format of minute (0-59), hour (0-23, 0 = midnight), day (1-31), month (1-12), weekday (0-6, 0 = Sunday), command
As an example
30 05 * * * /path/to/script
The script will run at 5:30AM everyday
A cron job can be user-defined as long as the name is added to the cron job
45 15 * * * roderick /home/roderick/script
At 3:45 pm everyday user roderick will run a script.