chroot [OPTION] NEWROOT [COMMAND [ARG]...]
Run COMMAND with root directory set to NEWROOT.
--userspec=USER:GROUP
specify user and group (ID or name) to use
--groups=G_LIST
specify supplementary groups as g1,g2,..,gN
--help display this help and exit
--version
output version information and exit
If no command is given, run ‘‘${SHELL} -i’’ (default: /bin/sh).