部署 Ubuntu 16.04 部署出错
参照教程 [地址][https://www.digitalocean.com/community/tutorials/deploying-a-rails-app-on-ubuntu-14-04-with-capistrano-nginx-and-puma]，进行部署实验出现如下几个错误，急求解答：
- 使用 rails s 或者 rails s -b 0.0.0.0 能够拉起服务而 rails server --binding="IP" 则出现如下错误：
initialize': Cannot assign requested address - bind(2) for "IP"
- 使用 cap production deploy:initial 进行部署的时候出现错误：
(Backtrace restricted to imported tasks)
cap aborted!
Don't know how to build task 'start' (see --tasks)
请各位大师给解答一下疑问
