jeffreys-air:~ Jeffrey$ gem install rails
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory.
我不知道这意味着什么。有人请解释
使用gem更新-系统升级Ruby gem管理器：
$ gem update --system
将其添加到.bash_profile
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*