Presuming you can still log into the machine, it's worth first becoming root: sudo -i
As asked in comment #2, please post the output of: df -h Then, look at the sizes of the directories in your root filesystem: cd / du -x --max-depth=1 . | sort -nr That will give you a summary of the disk usage in the directories directly under /, sorted with the largest first, in a file named du.out in /tmp. Please post that output. This should give you some idea of what's using the most of the space on /. Of course, you should check that /home is in fact on a separate filesystem with the command: mount If your /home directory is in fact in the root partition, look out particularly for large .googleearth directories (if you have it) and .xsession-errors files in users' home directories. Please report back your findings. Definitely don't go deleting files anywhere unless you are 100% sure they're not needed. If you don't know what the files do, leave them alone and ask. -- Update hangs with "filesystem" full - Not mentions which https://bugs.launchpad.net/bugs/329401 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs