I want to restart ssh or sshd but I get this error:
qqqq@Matrix-Server:/$ sudo /etc/init.d/ssh stop sudo: /etc/init.d/ssh: command not found qqqq@Matrix-Server:/$
Do I need to install ssh or sshd or does it come with Ubuntu?
There's an option in Ubuntu installing procedure to automatically install SSH server, if have not choosen it you need to install the package. The complete Ubuntu SSH package includes both server daemon and client.
The sshd is the ssh server deamon. So if you want to connect to a machine via ssh you need to install a ssh server on your target machine, e.g. using
The command ssh is what you use to actually connect to a machine running an ssh server. You need ssh installed on the machine that you want to ssh from.
But ssh will probably already be installed if you use any decent version of Ubuntu.
Now about restarting. What do you want to restart? If you want to restart the ssh server on the other machine (e.g. if you changed the config) use
Yes it is called ssh although the process is called sshd which might be confusing.