SSH to Unix/Linux with another port number

Connect to OpenSSH Server with different port number

#ssh  user@hostname -p9999

SYNOPSIS
ssh [-l login_name ] hostname | user@hostname [command ]

ssh [-afgknqstvxACNTX1246 ] [-b bind_address ] [-c cipher_spec ] [-e escape_char ] [-i identity_file ] [-l login_name ] [-m mac_spec ] [-o option ] [-p port ] [-F configfile ] [-L port host hostport ] [-R port host hostport ] [-D port ] hostname | user@hostname [command ]

Example:

#ssh john@10.1.1.1  -p1234