How to Manage Services with update-rc.d on Ubuntu 21.04
To Manage Services with update-rc.d on Ubuntu 21.04
Introduction:
Update-rc.d updates the System V data-style init script links which updates the System V data-style init script. Init runs these links when changing run levels. In general, they are used to start and stop system services such as daemons.
Installation Procedure:
Step 1: Check the OS version by using the below command
root@linuxhelp:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 21.04
Release: 21.04
Codename: hirsute
Step 2: Check the Activity status of the services by using the below command
root@linuxhelp:~# systemctl is-active apache2 && systemctl is-active mariadb
active
active
Step 3: Remove all the starting scripts on apache2 service by using the below command
root@linuxhelp:~# update-rc.d -f apache2 remove
Step 4: Remove all the starting scripts on mariadb services by using the below command
root@linuxhelp:~# update-rc.d -f mariadb remove
Step 5: Stop the services by using the below command
root@linuxhelp:~# service apache2 stop && service mariadb stop
Step 6: Recheck the Activity status of the services by using the below command
root@linuxhelp:~# systemctl is-active apache2 && systemctl is-active mariadb
inactive
Step 7: Enable the apache2 service as defaults by using the below command
root@linuxhelp:~# update-rc.d apache2 defaults
Step 8: Enable the mariadb service as defaults
root@linuxhelp:~# update-rc.d mariadb defaults
Step 9: Start and kill the apache2 service with custom priorities
root@linuxhelp:~# update-rc.d apache2 defaults 90 90
Step 10: Start and kill the mariadb service with custom priorities
root@linuxhelp:~# update-rc.d mariadb defaults 10 10
Step 11: Enable the apache2 service with custom run levels
root@linuxhelp:~# update-rc.d apache2 enable 2 3 4 5
Step 12: Enable the mariadb service with custom run levels
root@linuxhelp:~# update-rc.d mariadb enable 2 3 4 5
Step 13: Start the apache2 service by using the below command
root@linuxhelp:~# service apache2 start
Step 14: Start the mariadb service by using the below command
root@linuxhelp:~# service mariadb start
By this to Manage Services with update-rc.d on Ubuntu 21.04 have been completed.