Does init or systemd start gdm3 during boot?

Software PureOS
1

Hi everyone,

Im quite new to Linux and for sure to PureOS and actually still trying to learn what happens in my laptop after I hit the power button, so please excuse me if this question has an obvious answer.

So I thought, that the init process would start a scheduler, which is systemd and that would then start gdm3. So if i do 'pstree" I get a tree starting from systemd and that has a gdm3 branch directly attached. Makes sense. But if I do “ps -eF” I get sbin/init with PPID 0 and /usr/sbin/gdm3 with PPID 1. Doesnt that mean, that gdm3 is a direct child of init? Or does systemd somehow telll initi to start gdm3?

Thanks

2

in PureOS /sbin/init is the same as systemd:

dwaff@ayers2:~$ ls -l /sbin/init
lrwxrwxrwx 1 root root 20 Dec 22  2019 /sbin/init -> /lib/systemd/systemd

pstree and ps present the same information differently: ps displays process name as it was called with, while pstree with default options will dig to actual executable file in order to group the same executables together.

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