ssh on the first use, NetworkError:Connection refused

Okay let’s solve the problem.
after installing openssh-server by typing apt-get install openssh-server on linux terminal, you should generate key for authentication for ssh remote login.
root@revolutionaryroad:~#apt-get install openssh-server
Because, if you don’t do that, you can’t connect to your remote server using ssh connection. trust me!
it will show pop up windows which can be read as Network Error: Connection refused

all you have to do just like these steps bellow :