I'm trying to set up a kubernetes cluster on my virtual machines. I have one master and two nodes. I'm following this blog.
When I execute this command:
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
I get this error:
Could not get lock /var/lib/dpkg/lock
unable to lock the administration directory (/var/lib/dpkg/), is another process using it?