Environment

• Ubuntu 13.04
• Docker 1.7.0 (and 1.6.2)

Problem

After starting up kubernetes cluster, I find it's hard to get the minion resource info, so I cat /sys/fs/cgroup/memory/memory.memsw.usage_in_bytes, Ubuntu complains that "operation is not supported" even cat with sudo.

Docker did not support ubuntu raring right now, and I've installed Docker 1.6.2 and 1.7.0 from ppa, but neither of them works fine. What's the problem here, or is there some docker packages running on Ubuntu 13.04?

Thanks!