Change ssh port for ubuntu

1. Edit the file and set Port option

   Type the following command:
   $ sudo vi /etc/ssh/sshd_config
   Locate line that read as follows:
   Port 22
   OR
   #Port 22
   To set the port to 2222, enter:
   Port 2222

2. Updating your firewall to accept the ssh port 2222 in Linux

   If you are using UFW on a Ubuntu/Debian Linux, type:
   $ sudo ufw allow 2222/tcp
   The syntax for iptables is as follows
   $ sudo /sbin/iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 2222 -j ACCEPT
3. 
OR if you are using Ubuntu/Debian/Mint Linux:
$ sudo service ssh restart

Test

ssh xxxx.xxxx.xxxx.xxxx -p 2222