When installing a new application in Ubuntu,  you may sometimes get the “Could not get lock /var/lib/dpkg/lock”.  Specifically, you may get the following:

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?

When this happens,  wait a few minutes to check if this has not been set by the an automatic update job.  However, more often than not, you will end up doing the following:

sudo lsof /var/lib/dpkg/lock

I get the process ID and kill that ID by doing a

sudo kill -9 process_id

See https://askubuntu.com/questions/15433/unable-to-lock-the-administration-directory-var-lib-dpkg-is-another-process for more details.