Add some filesystem, kernel and network sysctl artifacts for Linux.
Add some filesystem, kernel and network sysctl artifacts for Linux.

crankyoldgit/artifacts,sebastianwelsh/artifacts,keithtyler/artifacts,sebastianwelsh/artifacts,crankyoldgit/artifacts,pidydx/artifacts,keithtyler/artifacts,destijl/artifacts,vonnopsled/artifacts,destijl/artifacts,pidydx/artifacts,vonnopsled/artifacts