switch_root(8) — Linux manual page

SWITCH_ROOT(8)            System Administration           SWITCH_ROOT(8)

NAME         top

       switch_root - switch to another filesystem as the root of the
       mount tree

SYNOPSIS         top

       switch_root [-hV]

       switch_root newroot init [arg...]

DESCRIPTION         top

       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         top

       -h, --help
              Display help text and exit.

       -V, --version
              Display version information and exit.

EXIT STATUS         top

       switch_root returns 0 on success and 1 on failure.

NOTES         top

       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         top

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

SEE ALSO         top

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

AVAILABILITY         top

       The switch_root command is part of the util-linux package and is
       available from
       https://www.kernel.org/pub/linux/utils/util-linux/.

COLOPHON         top

       This page is part of the util-linux (a random collection of Linux
       utilities) project.  Information about the project can be found
       at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.  If you
       have a bug report for this manual page, send it to
       util-linux@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2021-03-21.  (At that time, the date of the most recent commit
       that was found in the repository was 2021-03-19.)  If you
       discover any rendering problems in this HTML version of the page,
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       information in this COLOPHON (which is not part of the original
       manual page), send a mail to man-pages@man7.org

util-linux                      June 2009                 SWITCH_ROOT(8)

Pages that refer to this page: chroot(2),  pivot_root(2),  namespaces(7),  pid_namespaces(7),  pivot_root(8)

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