Question

In worm, what will happen if the ssh.connect(...) line fails? What code should be added in order to properly handle such scenarios?

Answer 1

Solution for ssh.connect() refused on Ubuntu

If ssh.connect() fails in a machine we need to install ssh server using below command
           sudo apt install ssh
Then it will ask for the permission
           Do you want to continue [y/n]
              Press y
Now it will install ssh server and wait for the process to complete.
Now again open ssh.connect() , and this time it will run on your machine.

Solution on Mac system

Here we are going to install couple of softwares first:

            sudo apt-get install tasksel

then     sudo tasksel and choose OpenSSH server

After the installation is finished then try to connect it again and this will run as a service now.