BusyBox v1.19.3 (Debian 1.19.3power3) built-in shell (ash) Enter 'help' for a list of built-in commands. ~ $ root sudo: must be setuid root ~ $ ls -l /usr/bin/sudo -rwxr-xr-x 2 root root 90040 Apr 17 2009 /usr/bin/sudo ~ $ chown root:root /usr/bin/sudo chown: /usr/bin/sudo: Operation not permitted ~ $ chmod 4755 /usr/bin/sudo chmod: /usr/bin/sudo: Operation not permitted ~ $ reboot -sh: reboot: not found