How can I uninstall Ruby on ubuntu?

Question

How can I uninstall Ruby 1.9.2dev (2010-07-02) [i486-linux] on ubuntu? Need to reinstall - please help

Answer 1

At first find out where ruby is? then

rm -rf /usr/local/lib/ruby
rm -rf /usr/lib/ruby
rm -f /usr/local/bin/ruby
rm -f /usr/bin/ruby
rm -f /usr/local/bin/irb
rm -f /usr/bin/irb
rm -f /usr/local/bin/gem
rm -f /usr/bin/gem