I got a present: older Rails tutorials that needs old ruby version. I try to install ruby-1.8 with the packet manager. I still got problems with the tutorial example code. Next I try rvm to install the old ruby version. Unfortunately I got an error. I do not know what to do. I search the internet. Many people got no problems with rvm. rvm use *ERROR: Branch origin/ruby_1_8_4 not found.* and *ERROR: Error running 'GEM_PATH="/usr/share/ruby-rvm/gems/ruby-1.8.4- tv1_8_4:/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4@global:/usr/share/ruby- rvm/gems/ruby-1.8.4-tv1_8_4:/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4@global" GEM_HOME="/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4" "/usr/share/ruby- rvm/rubies/ruby-1.8.4-tv1_8_4/bin/ruby" "/usr/share/ruby-rvm/src/rubygems- 1.3.7/setup.rb"', please read /usr/share/ruby-rvm/log/ruby-1.8.4- tv1_8_4/rubygems.install.log* Please give me a hint.