004- Using '~/.ssh/config' file

Example #1 - using SSH keys:

root@kvm-host1:~# hostname
kvm-host1.ab.lab

root@kvm-host1:~# ls -lh /root/.ssh/config 
-rw------- 1 root root 215 May  1 12:42 /root/.ssh/config

root@kvm-host1:~# cat /root/.ssh/config 
# --
# KVM Host 2
# --
# Using 'host2' as alias for 'kvm-host2'
Host kvm-host2 host2
  Hostname kvm-host2
  User root
  Port 22
  # Using private Key to establish the SSH connection
  IdentityFile /root/.ssh/id_rsa

root@kvm-host1:~# ssh host2

Example #2 - Using Proxy

# XYZ Jumpstart Server
Host  <ORIGINAL_HOSTNAME> <ALIAS_HOSTNAME>
        Hostname <IP_ADDRESS>
        User <USERNAME>
        ProxyCommand connect-proxy -S <PROXY_IP_ADDRESS> %h %p