NAME
chroot
- change root directory
SYNOPSIS
chroot
[-u user]
[-g group]
[-G group,group,...]
newroot
[command]
DESCRIPTION
The
chroot
command changes its root directory to the supplied directory
newroot
and exec's
command,
if supplied, or 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
:
SHELL
-
If set,
the string specified by
SHELL
is interpreted as the name of
the shell to exec.
If the variable
SHELL
is not set,
/bin/sh
is used.
SEE ALSO
chdir(2),
chroot(2),
environ(7)
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.