ruby 1.8.7
openssh

export $OPS_HOME="/path to your ops repo"
source $OPS_HOME/autocomplete

# ln -s this somewhere else if you're using a shared computer
# maybe create a local bin folder in ~/ and add it to your path

ln -s $OPS_HOME /usr/local/bin/ops

bundle install

{
  "IdentityLocations" : [ "~/.ssh", ... ],
    "AWS" : {
      "AccessKeyId" : "Your Access Key",
      "SecretAccessKey" : "Your Secret Access Key"
    }
}

usage: ops [ host ]:ssh

ops -T - List all tasks available

ops hosts:list - List all the hosts

ops hosts:sync - Sync hosts.json with EC2 instance list

ops hosts:add host=[ alias name ] hostname=[ ip address or hostname ] \
  identity=[ private key name ] user=[ user ]