When I try to run updates in ubuntu, I run 'apt-get update', which runs fine, but when I do 'apt-get upgrade' or 'apt-get autoremove' it returns:
E: Could not get lock /var/cache/apt/archives/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/cache/apt/archives/
I think this might be a result of a failed installation of a package a few days ago (It sometimes tells me something about needing to run 'dpkg --configure -a', which only sometimes works) when it froze during installation and I just cancelled it. Any help?
I'm running Ubuntu 13.04