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試圖安裝一個寶石（寶石安裝護欄）失敗，此錯誤：命令gem install rails failed with permissions error？
錯誤：在執行寶石...（GEM :: FilePermissionError）您沒有寫權限到/ usr/lib中/紅寶石/gems/1.8目錄。 任何人有想法如何解決這個問題？
我想從unix安裝導軌。
A
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