Added a couple of lines to https://help.ubuntu.com/community/HowToMD5SUM:
Finally, you can unmount the CD after leaving the folder: cd / sudo umount /dev/hda ** Changed in: ubuntu-docs (Ubuntu) Assignee: (unassigned) => Dougie Richardson (ddrichardson) -- After md5sum of a Ubuntu DVD the optical drive is unresponsive https://bugs.launchpad.net/bugs/155630 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