SIMPLE SOLUTIONS

SWITCH_ROOT(8) - Linux man page online | Administration and privileged commands

Switch to another filesystem as the root of the mount tree.

Chapter
June 2009
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 <@redhat.com> Jeremy Katz <@redhat.com> Karel Zak <@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)
This manual Reference Other manuals
switch_root(8) referred by aufs(5) | chroot(2) | namespaces(7) | pid_namespaces(7) | pivot_root(2) | pivot_root(8)
refer to chroot(2) | mkinitrd(8) | mount(8)
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