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Man Pages


Manual Reference Pages  -  SWITCH_ROOT (8)

NAME

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

CONTENTS

Synopsis
Description
Options
Return Value
Notes
Authors
Availability

SYNOPSIS

switch_root [-hV]

switch_root newroot init [arg...]

DESCRIPTION

switch_root moves already mounted /proc, /dev and /sys 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 show help and exit
-V, --version show version number 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

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

AUTHORS

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

AVAILABILITY

The switch_root command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
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Linux SWITCH_ROOT (8) June 2009

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