Applying mount Namespaces

“For some time the filesystem in Linux was a fairly simple tree.
A process could chroot() itself as though the root of the
filesystem tree was a subdirectory of the system’s filesystem root.
At any node in the tree, a filesystem could be overlaid from a new
device.

“In 2000, Al Viro introduced bind mounts and filesystem
namespaces for Linux:

• “A bind mount allows any file or directory to be accessible
  from any other location.
• “Filesystem namespaces are completely separate filesystem trees
  associated with different processes…”

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