switch_root (8) - Linux Man Pages
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
DESCRIPTIONswitch_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.
- -h, --help
- Display help text and exit.
- -V, --version
Display version information and exit.
RETURN VALUEswitch_root returns 0 on success and 1 on failure.
NOTESswitch_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
Peter Jones <pjones [at] redhat.com> Jeremy Katz <katzj [at] redhat.com> Karel Zak <kzak [at] redhat.com>
AVAILABILITYThe switch_root command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.