INSTALL AND RUN CRONJOB ON UBUNTU

Steps:

1. install cronjob with command sudo apt-get install cron

2. start cronjob with command sudo service cron start

3. check the status of cronjob with command sudo service cron status

4. create a .sh script for the execution to be done by cronjob (example: /home/ferdyhape/tes-cron/tes-cron.sh)

5. (optional) command select-editor to choose the editor used to edit crontab

6. add the script to the cronjob with the command "crontab -e", with the format

   # min hour day month day_of_week command
   * * * * * /bin/bash /home/ferdyhape/tes-cron/tes-cron.sh
   

7. save the changes and exit the editor

8. check the cronjob list with the command "crontab -l"

9. check the cronjob log with the command "grep CRON /var/log/syslog"

Note:

• For the script to be executed by cronjob, the script must have execute permission. Give execute permission with the command chmod +x /home/ferdyhape/tes-cron/tes-cron.sh
• The cronjob will run every minute, to change the schedule, adjust the time in the format "min hour day month day_of_week command"
• To stop the cronjob, use the command sudo service cron stop
• To restart the cronjob, use the command sudo service cron restart
• To remove the cronjob, use the command crontab -r