I can confirm this bug. I have a similar crypttab with only "luks" on the very right and I get the same warning every boot. Unlocking the drive works without any problems. This did not happen with previous ubuntu versions.
** Tags added: cosmic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1804314 Title: Wrong WARNING Option 'hash' missing in crypttab To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1804314/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
