Insecure world writable dir /usr/local/bin in PATH, mode 040777

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/universal-darwin16/rbconfig.rb:213: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
权限问题
解:
sudo chmod go-w /usr/local/bin

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