The following file comes from http://lwn.net/Articles/531381/
- demo_uts_namespaces.c
- ns_exec.c
- unshare.c
the following file comes form http://lwn.net/Articles/531419/
- pidns_init_sleep.c
- multi_pidns.c
the following file commes form http://lwn.net/Articles/532748/
- ns_child_exec.c
- simple_init.c
- orphan.c
- ns_run.c
the following file commes form http://lwn.net/Articles/532593/
- demo_userns.c
- userns_child_exec.c
the following file commes form http://lwn.net/Articles/540087/
- userns_setns_test.c