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SWITCH_ROOT


Section: Maintenance Commands (8)
Updated: June 2009
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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 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 <[email protected]>
Jeremy Katz <[email protected]>
Karel Zak <[email protected]>

 

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/.



 

Index



NAME

SYNOPSIS

DESCRIPTION

OPTIONS

RETURN VALUE

NOTES

SEE ALSO

AUTHORS

AVAILABILITY



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