Yep I saw there was a systemctl service :
root@galileo:/dev/cpu# systemctl list-unit-files *sshd*
UNIT FILE STATE
But I have to clue how to enable it :
root@galileo:/dev/cpu# systemctl enable sshd@
The unit files have no [Install] section. They are not meant to be enabled
Possible reasons for having this kind of units are:
1) A unit may be statically enabled by being symlinked from another unit's
.wants/ or .requires/ directory.
2) A unit's purpose may be to act as a helper for some other unit which has
a requirement dependency on it.
3) A unit may be started when needed via activation (socket, path, timer,
D-Bus, udev, scripted systemctl call, ...).
I don't know systemctl... maybe that's why