Быстрый доступ к серверам по ssh

$ touch ~/.ssh/config

$ cat ~/.ssh/config
Host serv1

HostName 192.168.0.1
User myname
Port 22

Host serv2

HostName 192.168.0.2
User myname
Port 22

Host serv3

HostName 192.168.0.3
User myname
Port 22

Host serv4

HostName 192.168.0.4
User myname
Port 22

Host mydomain

HostName mydomain.dyndns.org
User myname
Port 22

$ ssh serv1
myname@serv1:/$