ssh issues

 (1) To resolve: Port 22: Connection Refused 
       step1 : sudo service ssh status
       step2: if "ssh: unrecognized service", then
       sudo apt-get update
       sudo apt-get install openssh-server

(2) Best resource for SSH issues: https://likegeeks.com/ssh-connection-refused/
      (pdf of this page is available in my google drive - fix_SSH-Connection-Refused.pdf)