Compare the output from a group of hosts to a canonical good expected return.
Check the expected output of a command across N hosts and compare to what you think it should be.
knife canon -C "good stuff" QUERY COMMAND
example:
knife canon -C "rsync-3.0.6-1.el5.rf" fqdn:example.com "rpm -q rsync"
myhost1.example.com failed to match expected output: rsync-3.0.5
myhost2.example.com failed to match expected output: rsync-3.0.4
Surpresses output from hosts that match. Useful when plotting convergence paths.
I'm getting better at the ruby.
I'll work on getting the output red for non-matching hosts.