Error: /usr/local/lib/ruby/1.8/irb/completion.rb:10:in `require’: no such file to load — readline (LoadError)

When attempting to run irb you get the above error.

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I recently ran into an issue with load testing ruby on rails while attempting to post xml data to a ruby appplication via httperf. Everything seemed correct except I could not get httperf to post this data correctly. The issue ended up being that the httperf switch -add-header requires a \n at the end of your HTTP header to process correctly. The entire command to test against the ruby application is below.

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