This is from RedHat. Not implemented by everyone, but modern OSes (e.g. CoreOS) seem to follow the patterns. CoreOS also do everything in their power to prevent you from mounting /usr as writeable.
Perhaps that doesn't pass your bar for 'real' though since it's not globally implemented ;)
This is from RedHat. Not implemented by everyone, but modern OSes (e.g. CoreOS) seem to follow the patterns. CoreOS also do everything in their power to prevent you from mounting /usr as writeable.
Perhaps that doesn't pass your bar for 'real' though since it's not globally implemented ;)