Description of problem:
In https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/Resource_Management_and_Linux_Containers_Guide/index.html#part-Linux_Containers there is a mention of /sys/fs/cgroups/ direcory which actually doesn't exist. The right name should be /sys/fs/cgroup/.
Look for /sys/fs/cgroups/ in section 1.2. Default Cgroup Hierarchies, at the end of the paragraph.
I'm not sure if it is mentioned elsewhere.
Version-Release number of selected component (if applicable):
Revision 0.0-0.14.405 Thu Jul 7 2014