command changes its root directory to
the supplied directory newroot
, if supplied, or an interactive copy
of the user's shell.
command is restricted to the superuser.
The options are as follows:
- Override the primary and supplemental group IDs. The
primary group ID is set to the first group in the list. Any remaining
groups are placed in the supplemental group ID vector. Each group listed
must exist in the group(5)
- Set user ID to user (which
must exist in the passwd(5)
database). The primary and supplemental group IDs will be set based on the
user's entries in the
group(5) databases unless
overridden by the -g option. Additional
settings may be applied as specified in
on user's login class.
- If set, the string specified by
SHELL is interpreted as the name of the
shell to execute. If the variable
is not set, /bin/sh is used.
utility first appeared in
should never be installed setuid root, as it
would then be possible to exploit the program to gain root privileges.