switch_root --version (return code: 0)
switch_root from util-linux 2.27.1
switch_root --help (return code: 0)
Usage:
switch_root [options] <newrootdir> <init> <args to init>
Switch to another filesystem as the root of the mount tree.
Options:
-h, --help display this help and exit
-V, --version output version information and exit
For more details see switch_root(8).