It is possible to save configuration of ssh connection for later usage. For example, one had to type
ssh <username>@<ip address> -p <port> -i <path to key file>
every time one wants to connect to server.
~/.ssh/config with following content:
Host <name> Hostname <ip address> Port <port> User <username> IdentityFile <path to key file (if any)>
Now just type
to get connected to the server.