install @ ubuntu, kubuntu:
$ sudo apt-get install ruby irb ri rubygems
ruby - the ruby command interpreter
irb - a command line testing tool
ri - documentation, developers manual
rubygems - gems is used to access the ruby custom components repository - a rpm like repository for ruby components
There is a faster developer manual tool: fastri
fastri install:
$ sudo gem install fastri
$ sudo fastri-server -b
fastri query example:
$ qri String#length
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