This bug was fixed in the package systemd - 218-10ubuntu1
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systemd (218-10ubuntu1) vivid; urgency=medium
[ Martin Pitt ]
* Merge with Debian unstable. Remaining Ubuntu changes:
- Hack to support system-image read-only /etc, and modify files in
/etc/writable/ instead.
This bug was fixed in the package lxcfs - 0.5-0ubuntu2
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lxcfs (0.5-0ubuntu2) vivid; urgency=medium
* debian/lxcfs.service: Drop seddery of /etc/mtab, which turns /etc/mtab
into a file. Under systemd, /etc/mtab is always a symlink to /proc/mounts.
(LP: #1419623)
*
