Redis-server failing to start

See this on both trusty/sudo builds and default container builds:

$ sudo service redis-server start
Starting redis-server: /etc/init.d/redis-server: 58: ulimit: error setting limit (Operation not permitted)

See Trusty environment: redis-server not starting with redis-tools installed

Coincidentally, the ulimit message should be just a warning. It has no bearing on whether or not the server starts.

Thank you, that was indeed the problem!