Can you look at /var/log/mysql/error.log ? This should state the problem why mysql isn't starting.
Also you can try: dpkg-reconfigure mysql-server-5.5 To reconfigure the mysql settings again ** Changed in: mysql-5.5 (Ubuntu) Status: New => Incomplete ** Changed in: mysql-5.5 (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1090330 Title: package mysql-server-5.5 5.5.28-0ubuntu0.12.10.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.5/+bug/1090330/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs