How to check which kernel init system is on the server?

Question

linux

Hello, I have such a question, how to determine which initialization system is on the linux server? Is there any command to show this? Of course, I understand that now the latest distributions come with systemd on board, but still I would like to see this clearly, since my system does not have such a utility as systemctl, so it does not have systemd?

Answer 1

I don't know about others, but for Arch and Ubuntu you can use the init --version command :

$ uname -n
arch
$ init --version | head -n1
systemd 230

$ uname -n
ubuntu
$ init --version | head -n1
init (upstart 1.12.1)

Answer 2

See where /sbin/init points (this is a symlink).

Answer 3

You can check which initialization system on Linux in many ways, as the rules all of them depend on the version of the Linux distribution and not all work 100% on all distributions, initially we check if it shows a symlin like
then everything is clear - systemd
if there is no symlink, then the command
will issue either SYSTEMD or UPSTART or SYSVINIT

Answer 4

Actually, if there is no systemctl, then there is no systemd guaranteed. Any attempt to access systemctl will show everything

Answer 5

there is no such thing in Debian, but you can do man init and it says on top that systemd