1. install nano
# apt-get install nano

2. edit file /etc/ssh/sshd_config 
# nano /etc/ssh/sshd_config

3. now you can add port, example port 80
   you search "# What's Port, Ip, blablabla" you add port below that
# What's port, Ip, ......
Port 22
Port 80

4. now pres : CTRL+o , Ctrl+x

5. restat ssh
# service ssh restart