- Start: be sidekiq -d -L log/sidekiq.log
 - Stop: ps -ef | grep sidekiq | grep -v grep | awk '{print $2}' | xargs kill -9
 
- Start: elasticsearch --config=/usr/local/opt/elasticsearch/config/elasticsearch.yml
 
- Start: redis-server /usr/local/etc/redis.conf
 
- compact objects: 
git repack -a -d --depth=250 --window=250 
- remove old gems: 
gem cleanup 
- empty gemset:
 
  $ rvm gemset use NAME
  $ rvm gemset empty NAME- cleanup: 
rvm cleanup [all]