SysVinit is traditional & mother of init system which is the first process get started by kernel and holding PID 1. All the services is available on “/etc/init.d/” folder. If you want to start, stop, restart, enable, reload & status of the service follow the below commands to do it. Make sure you should have root or sudo Permission to run the below commands. Here I have covered all the services commands such as Apache, MySQL, MariaDB, Bind (Named, Bind9), Nginx, Lighttpd, Exim, Postfix, Sendmail, Qmail, etc..
We can use two different ways to interact the services in Linux, service [daemon] [usage] or /etc/init.d/[daemon] [usage]
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