Issuing “apt-get update” or “apt-get upgrade” commands resulted in the following error:
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
I couldn’t locate any running processes which would be locking these files so went ahead and removed the lock files via:
sudo rm /var/lib/apt/lists/lock sudo rm /var/cache/apt/archives/lock sudo rm /var/lib/dpkg/lock
And then repeated the commands successfully.