This is easy tip. But I never knew in so many years.
Tip : How to open remote shell without typing the full server and user detail. Its like SSH alias.
Open the ssh folder.
cd /home/ganu/.ssh/ touch config vi config
Then add the following lines in the config file
Host host1 User=ganu Hostname=some.server.com Host host2 User=user2 Hostname=some.host.server.com
Then save this file and just type
It will ask for password. And you are done.