ã²ã•ã³ã•ã«Ubuntuã«Rails環境構築ã—ã¦ãŸã‚‰ã‚¨ãƒ©ãƒ¼ã§ã¾ãã‚Šã ã£ãŸã®ã§ã€èª¿ã¹ãŸçµæžœã€‚メモã§ã™ã€‚ - cys b環境ã¯Ubuntu 8.04 LTS（"Hardy Heronï¼é ‘丈ãªã‚µã‚®"）ã§Rails環境を構築ä¸ã€‚ 症状ã¯ã€gem install hogeã—よã†ã¨ã—ã¦ã€ /usr/bin/gem:10: undefined method `manage_gems' for Gem:Module (NoMethodError) ãŒå‡ºãŸã€‚ 対処ã¨ã—ã¦ã¯ã€ gem1.8を使ㆠ例) gem1.8 install hoge ã¨ã‚„る。 gemã‚’ã„ã˜ã‚‹ sudo vi /usr/bin/gemã—ã¦ã€ Gem.manage_gems ã®è¡Œã‚’ #Gem.manage_gems ã«å¤‰æ›´ è¿½åŠ ï¼‰require 'rubygems/gem_runner' http://www.videc.at/2009/04/30/rubygems-undefined-method-manage_gems-for-gemmodule-
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