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我正在使用導軌3.2.6打開導軌控制檯時出現以下錯誤,請告訴我解決方案。導軌3.2.6打開導軌控制檯錯誤
/home/rajani/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/completion.rb:9:in require': cannot load such file -- readline (LoadError) from /home/rajani/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/irb/completion.rb:9:in
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