You should use "sudo -s" instead. "-s The -s (shell) option runs the shell specified by the SHELL environment variable if it is set or the shell as specified in passwd(5)."
** Changed in: sudo (Ubuntu) Status: Unconfirmed => Rejected -- can't sudo shell inbuilts, e.g. cd https://launchpad.net/bugs/66070 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs