Comment 4 for bug 1316326

but as Sam Su said, by mistake if we ran into this situation, how do we recover?
i also ran into this situation. I removed devstack and cloned it again as user stack but still i am not able to run stack.sh

console o/p:
sudo: >>> /etc/sudoers.d/50_stack_sh: syntax error near line 0 <<<
sudo: >>> /etc/sudoers.d/50_stack_sh: syntax error near line 1 <<<
sudo: >>> /etc/sudoers.d/50_stack_sh: syntax error near line 3 <<<
sudo: parse error in /etc/sudoers.d/50_stack_sh near line 0
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin