Man Pages

SWITCH_ROOT


NAME
SYNOPSIS
DESCRIPTION
OPTIONS
RETURN VALUE
NOTES
SEE ALSO
AUTHORS
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.

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 package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

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