title: Google-Compute-Engine Virtual Machine Instance: Unable to login/SSH the VM instance after adding a disk
body: <p>GCP VM instance: OS: Ubuntu (18.04 bionic) Disk size: 10GB. Later added another disk of 10 GB.</p>
  <p>While working on the GCP VM instance, I was facing the issue for 'no-disk space left'. Then, I created another disk of 10 GB and added to this GCP VM instance as referred in <a href="https://cloud.google.com/compute/docs/disks/add-persistent-disk?&amp;_ga=2.217520662.-1058595688.1590395241#formatting" rel="nofollow noreferrer">https://cloud.google.com/compute/docs/disks/add-persistent-disk?&amp;_ga=2.217520662.-1058595688.1590395241#formatting</a></p>
  <p>Now, I exited the GCP VM instance and stopped it.</p>
  <p>Later on, when I restarted the GCP VM instance, I am unable to connect. I tried to connect using the SSH connection option available on GCP, putty, WinSCP and telnet, but I am unable to connect now.</p>
  <p>My understanding to this is that it might be possible that some services might have stopped on the GCP VM instance. Is there a way to check whether the services are running or not on the GCP VM instances. If yes,then how?</p>
  <p>If you think, there is some other issue for connecting to the GCP VM instance then please let me know.</p>