switch_root (8) - Linux Manuals
switch_root: switch to another filesystem as the root of the mount tree
switch_root - switch to another filesystem as the root of the mount tree
switch_root moves already mounted /proc, /dev, /sys and /run to newroot and makes newroot the new root filesystem and starts init process.
- Display help text and exit.
- Display version information and exit.
switch_root will fail to function if newroot is not the root of a mount. If you want to switch root into a directory that does not meet this requirement then you can first use a bind-mounting trick to turn any directory into a mount point:
mount --bind $DIR $DIR
For bug reports, use the issue tracker at <https://github.com/karelzak/util-linux/issues>.
The switch_root command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.