NAME
chroot
—
change root directory
SYNOPSIS
chroot |
[-G group,group,...]
[-g group]
[-u user]
newroot [command] |
DESCRIPTION
Thechroot
command changes its root directory to the
supplied directory newroot and exec's
command, or, if not supplied, an interactive copy of
your shell.
If the -u
, -g
, or
-G
options are given, the user, group, and group
list of the process are set to these values after the chroot has taken
place; see setgid(2),
setgroups(2),
setuid(2),
getgrnam(3), and
getpwnam(3).
Note: command or the shell are run as your real-user-id.
ENVIRONMENT
The following environment variable is referenced by
chroot
:
SHELL
- If set, the string specified by
SHELL
is interpreted as the name of the shell to exec. If the variableSHELL
is not set, /bin/sh is used.
SEE ALSO
HISTORY
The chroot
utility first appeared in
4.4BSD.
SECURITY CONSIDERATIONS
chroot
should never be installed setuid
root, as it would then be possible to exploit the program to gain root
privileges.