how to add cron job in linux code example

Example 1: create cron job from command line

#write out current crontab
crontab -l > mycron
#echo new cron into cron file
echo "00 09 * * 1-5 echo hello" >> mycron
#install new cron file
crontab mycron
rm mycron

Example 2: add new cron job in linux

For editing the cron job file : 
	crontab -e
    
For listing all the running cron job     
	systemctl status cron  ----OR----  crontab -l