have R halt the EC2 machine it's running on

Question

I have a few work flows where I would like R to halt the Linux machine it\'s running on after completion of a script. I can think of two similar ways to do this:

1. r

Answer 1

sudo is an option -- it allows you to run certain commands without prompting for any password. Just put something like this in /etc/sudoers

 ALL=(ALL) PASSWD: ALL, NOPASSWD: /sbin/halt

(of course replacing with the name of user running R) and system('sudo halt') should just work.