Public bug reported: this morning our machines performed security updates. As a result of this we lost /usr/bin/ruby (it was just non-existant)
This seems to be when ruby package is upgraded _before_ libruby1.9.1. Reinstalling the ruby package fixed this. dpkg.log follows (you can see my manual reinstall of ruby at 09:35): 2014-11-05 08:05:30 startup archives unpack 2014-11-05 08:05:31 upgrade libruby1.9.1:amd64 1.9.3.484-2ubuntu1 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:31 status half-configured libruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:31 status unpacked libruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:31 status half-installed libruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status half-installed libruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status unpacked libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:32 status unpacked libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:32 upgrade ruby1.9.1:amd64 1.9.3.484-2ubuntu1 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:32 status half-configured ruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status unpacked ruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status half-installed ruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status triggers-pending man-db:amd64 2.6.7.1-1 2014-11-05 08:05:32 status half-installed ruby1.9.1:amd64 1.9.3.484-2ubuntu1 2014-11-05 08:05:32 status unpacked ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:32 status unpacked ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:32 trigproc man-db:amd64 2.6.7.1-1 2.6.7.1-1 2014-11-05 08:05:32 status half-configured man-db:amd64 2.6.7.1-1 2014-11-05 08:05:33 status installed man-db:amd64 2.6.7.1-1 2014-11-05 08:05:33 startup packages configure 2014-11-05 08:05:33 configure libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 <none> 2014-11-05 08:05:33 status unpacked libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:33 status unpacked libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:33 status half-configured libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:34 status installed libruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:34 status triggers-pending libc-bin:amd64 2.19-0ubuntu6.3 2014-11-05 08:05:34 configure ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 <none> 2014-11-05 08:05:34 status unpacked ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:34 status half-configured ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:34 status installed ruby1.9.1:amd64 1.9.3.484-2ubuntu1.1 2014-11-05 08:05:34 trigproc libc-bin:amd64 2.19-0ubuntu6.3 <none> 2014-11-05 08:05:34 status half-configured libc-bin:amd64 2.19-0ubuntu6.3 2014-11-05 08:05:34 status installed libc-bin:amd64 2.19-0ubuntu6.3 2014-11-05 09:35:27 startup packages purge 2014-11-05 09:35:27 status installed ruby:all 1:1.9.3.4 2014-11-05 09:35:44 startup archives unpack 2014-11-05 09:35:46 upgrade ruby:all 1:1.9.3.4 1:1.9.3.4 2014-11-05 09:35:46 status half-configured ruby:all 1:1.9.3.4 2014-11-05 09:35:46 status unpacked ruby:all 1:1.9.3.4 2014-11-05 09:35:46 status half-installed ruby:all 1:1.9.3.4 2014-11-05 09:35:46 status triggers-pending man-db:amd64 2.6.7.1-1 2014-11-05 09:35:46 status half-installed ruby:all 1:1.9.3.4 2014-11-05 09:35:46 status unpacked ruby:all 1:1.9.3.4 2014-11-05 09:35:46 status unpacked ruby:all 1:1.9.3.4 2014-11-05 09:35:46 trigproc man-db:amd64 2.6.7.1-1 2.6.7.1-1 2014-11-05 09:35:46 status half-configured man-db:amd64 2.6.7.1-1 2014-11-05 09:35:47 status installed man-db:amd64 2.6.7.1-1 2014-11-05 09:35:47 startup packages configure 2014-11-05 09:35:47 configure ruby:all 1:1.9.3.4 <none> 2014-11-05 09:35:47 status unpacked ruby:all 1:1.9.3.4 2014-11-05 09:35:47 status half-configured ruby:all 1:1.9.3.4 2014-11-05 09:35:47 status installed ruby:all 1:1.9.3.4 ** Affects: ruby1.9.1 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1389596 Title: upgrade removed ruby To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ruby1.9.1/+bug/1389596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs