change root directory
chroot command changes its root
directory to the supplied directory newroot and
executes command, if supplied, or an interactive copy
of the user's shell.
chroot command is restricted to the
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) databases.
- 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
passwd(5) and group(5) databases unless overridden by the
-goption. Additional settings may be applied as specified in login.conf(5) depending on user's login class.
- If set, the string specified by
SHELLis interpreted as the name of the shell to execute. If the variable
SHELLis not set, /bin/sh is used.
ldd(1), group(5), login.conf(5), passwd(5), environ(7)
chroot utility first appeared in
chroot should never be installed setuid
root, as it would then be possible to exploit the program to gain root