Installing the OpenSSH server and client applications is simple. To install the OpenSSH client application on Ubuntu systems, use this command at a terminal prompt:
sudo apt-get install openssh-client
To install the OpenSSH server application and its supporting files, use this command at a terminal prompt:
sudo apt-get install openssh-server
If the DHC assigns us a different IP each time, or it simply never occurred to us to need to know this detail about our home server, we need to retrieve it, for this purpose we use the command
$ ifconfig
You don’t need to be root and therefore use sudo to use it we get the ip: 192.168.1.23
we can then try connecting from another machine with ssh <username>@<hostip>.
in my case