Rails cache by memory_store with 1-day expiration

Rails cache has no expiration by default.
So I save the time cached in the cache itself.

Sync crontab and Rails with Capistrano

1. Put `crontab -l` into a file and add it into your repository
2. Add lines below to your config/deploy.rb



that's all. crontab on production server will be refreshed after every deployment.

新しいの5個だけ残してあとは消す

Rubyで書こうとしましたが、間違いでした。
Unixすばらしい。