Remounting from the debug shell works, and allowed me to link mtab to /proc/mounts. However, on reboot the error manifested again! I attach the journal from after the reboot.
** Attachment added: "journal2.txt" https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1431743/+attachment/4344496/+files/journal2.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1431743 Title: fails to boot due to read-ony file system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1431743/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs