Try su - nobody #(pristine account) then type :<RET> then type ESC . ESC . Whammo! The shell dies!
The second ESC . acts like ^D. # su - nobody No directory, logging in with HOME=/ nobody@jidanni5:/$ cd /tmp nobody@jidanni5:/tmp$ script Script started, file is typescript nobody@jidanni5:/tmp$ : nobody@jidanni5:/tmp$ :Script done, file is typescript $ cat -v typescript Script started on Thu Feb 20 13:10:28 2014 nobody@jidanni5:/tmp$ :^M nobody@jidanni5:/tmp$ : Script done on Thu Feb 20 13:10:33 2014 nobody@jidanni5:/tmp$ echo $BASH_VERSION 4.3.0(1)-rc2
