Great, glad to hear it! dpkg lines beginning with "W: " are just warnings; they shouldn't result in failures or anything. This particular warning just means that you have a duplicate entry in your /etc/apt/sources.list file.
Since your problem seems to be solved, I'll go ahead and close this bug out. ** Changed in: dpkg (Ubuntu) Assignee: Micah Cowan => (unassigned) Status: Incomplete => Invalid -- E: _cache->open() failed, please report. https://bugs.launchpad.net/bugs/121930 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs