leslin@leslinubt:~/workspace/rorails/leslincms$ rails console
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.8/lib/rails/script_rails_loader.rb:11: warning: insecure world writable dir /usr/local/ruby/bin in path, mode 040777
/usr/local/ruby/lib/ruby/gems/1.9.1/gems/bundler-1.0.10/lib/bundler/runtime.rb:136: warning: insecure world writable dir /usr/local/ruby/bin in path, mode 040777
/usr/local/ruby/lib/ruby/1.9.1/irb/completion.rb:9:in `require': no such file to load -- readline (loaderror)
from /usr/local/ruby/lib/ruby/1.9.1/irb/completion.rb:9:in `'
from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.8/lib/rails/commands/console.rb:3:in `require'
from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.8/lib/rails/commands/console.rb:3:in `'
from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.8/lib/rails/commands.rb:20:in `require'
from /usr/local/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.8/lib/rails/commands.rb:20:in `'
from script/rails:6:in `require'
from script/rails:6:in `'
解決方法：
sudo apt-get install libncurses5-devsudo apt-get install libreadline5-dev
cd /usr/src/ruby-1.8.7-p72/ext/readline
ruby extconf.rb
make
sudo make install
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