Yelp/mrjob — pull request #264 by irskep (2011-11-11 19:17:24+00:00)
Title: mrjob.tools.emr.mrboss: run a command on all nodes

This tool should help us debug memory issues on Hadoop 0.20 by letting us get the output of `ps` on all nodes at any point in time.

I had to tweak `ssh.py` to break the error checking for `ls` and `cat` out of the main `ssh_run()` function, and make `ssh_run_with_recursion()` public.