Comment 16 for bug 1446982

This does seem to be a systemd problem that is affecting a lot of different applications -- basically any application that would like a SIGTERM on reboot/shutdown so that it can save or clean up resources gracefully.

See https://bugzilla.redhat.com/show_bug.cgi?id=1141137 (upstream systemd issue)

https://bugzilla.redhat.com/show_bug.cgi?id=1170765 (systemd issue affecting bash's attempt to save history)

https://github.com/cockpit-project/cockpit/issues/1155 (systemd issue affecting cockpit)

http://lists.freedesktop.org/archives/systemd-devel/2014-October/024452.html (discussion)

My suggestion would be that you open a new bug report against systemd in Ubuntu 15.04 and mention that it is affecting bash and mosh (and probably every other application that would like to clean up gracefully on shutdown or reboot).