dpkg: error: dpkg status database is locked by another process

readme.md

First run:

lsof /var/lib/dpkg/lock 

Then make sure that process isn't running:

ps cax | grep PID 

If it is running:

kill PID
#wait
kill -9 PID 

Make sure process is done:

ps cax | grep PID

Then remove the lock file:

sudo rm /var/lib/dpkg/lock 

Let dpkg fix itself:

sudo dpkg --configure -a

You should be fine afterwards :)

Source https://askubuntu.com/questions/219545/dpkg-error-dpkg-status-database-is-locked-by-another-process