In Linux there are several services that can be started and stopped manually in the system, some of there services are ssh, HTTP, tor, apache, etc. To start and run these services we used to simply type
service "service name" start/stop/status/restart
Service ssh start
And to check if this service is running we type the command
service ssh status
In this simple manner, we are using service management in Linux but what actually happens and how it actually works in the background.
What is init.d?
All these service works on several scripts and these scripts are stored in /etc/init.d location, this init.d is deamon which is the first process of the Linux system. Then other processes, services, daemons, and threats are started by init. So init.d is a configuration database for the init process. Now let’s check some daemon scripts by printing some processes, a daemon script holds functions like start, stop, status and restart. Let’s check ssh as an example.
Now to you know about daemon script lets also check what is inside of init.d directory, to do this we will simply list out all the fines inside the location
How to Use init.d in Service Management?
We used to type simple command service ssh start. But now, in this case, we will do it the other way which is also simple.
and the same way you can stop