If you see something like this on your terminal when you’re doing an update or install then you’ll know you have a problem.
sudo apt-get install Reading package lists... Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/toolbelt.heroku.com_ubuntu_._en E: The package lists or status file could not be parsed or opened.
Fortunately, it’s really to fix it. To do that simply:
sudo apt-get clean cd /var/lib/apt sudo mv lists lists.old sudo mkdir -p lists/partial sudo apt-get clean sudo apt-get update
And that’s all there is to it! I hope this helps.