If you want to run some processes like backup , generate image thumbnail etc.. in the background.
The is an easy way to do this, we can using Crontab to handle this task so it will automatically do the job in your schedule task.
What is Crontab ?
Crontab is found in unix and unix-like O/S, cron derives from chronos greek time and it used to schedule command or execute it periodically.
How to Verify Crontab Running in The System ?
Login into your server and type this command below :
#crontab -l