This was true before the advent of mount namespaces, but is now incorrect: See namespace(7) or something like: http://stackoverflow.com/questions/22889241/

This was true before the advent of mount namespaces, but is now incorrect: See namespace(7) or something like: http://stackoverflow.com/questions/22889241/linux-understanding-the-mount-namespace-clone-clone-newns-flag http://www.ibm.com/developerworks/library/l-mount-namespaces/