SWITCH_ROOT
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
NOTES
AUTHORS
SEE ALSO
AVAILABILITY
NAME
switch_root − switch to another filesystem as the root of the mount tree
SYNOPSIS
switch_root [−hV]
switch_root newroot init [arg…]
DESCRIPTION
switch_root moves already mounted /proc, /dev, /sys and /run to newroot and makes newroot the new root filesystem and starts init process.
WARNING: switch_root removes recursively all files and directories on the current root filesystem.
OPTIONS
−h, −−help
Display help text and exit.
−V, −−version
Display version information and exit.
EXIT STATUS
switch_root returns 0 on success and 1 on failure.
NOTES
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
AUTHORS
Peter Jones
Karel Zak
SEE ALSO
chroot(2), init(8), mkinitrd(8), mount(8)
AVAILABILITY
The switch_root command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.