switch_root(8) - phpMan

SWITCH_ROOT(8)                        System Administration                        SWITCH_ROOT(8)

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.

RETURN VALUE
       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

SEE ALSO
       chroot(2), init(8), mkinitrd(8), mount(8)

AUTHORS
       Peter Jones <pjones AT redhat.com>
       Jeremy Katz <katzj AT redhat.com>
       Karel Zak <kzak AT redhat.com>

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/.

util-linux                                  June 2009                              SWITCH_ROOT(8)

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