An SSH server, by default, listens to port 22, and you don't have to manually specify the port number on your SSH client if you're connecting to the server's default port.
You can specify the port number when connecting to non-standard SSH ports using the -p option or adding the port information in your SSH client's configuration file.
$ nc -zv remotehost 2022 Connection to remotehost 2022 port [tcp/*] succeeded!
-v Produce more verbose output. -z Only scan for listening daemons, without sending any data to them. Cannot be used together with -l.
$ ssh remoteuser@remotehost -p 2022
$ cat .ssh/config Host remotehost hostname 192.168.1.10 user remoteuser port 2022
$ ssh remotehost
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