update alternatives ruby versions

update-alternatives

# 1.8.7 enterprise ruby

sudo update-alternatives --install /usr/local/bin/ruby ruby /opt/ruby-enterprise-1.8.7-2010.01/bin/ruby 500 --slave /usr/local/bin/erb erb /opt/ruby-enterprise-1.8.7-2010.01/bin/erb --slave /usr/local/bin/gem gem /opt/ruby-enterprise-1.8.7-2010.01/bin/gem --slave /usr/local/bin/irb irb /opt/ruby-enterprise-1.8.7-2010.01/bin/irb --slave /usr/local/bin/rake rake /opt/ruby-enterprise-1.8.7-2010.01/bin/rake --slave /usr/local/bin/rdoc rdoc /opt/ruby-enterprise-1.8.7-2010.01/bin/rdoc --slave /usr/local/bin/ri ri /opt/ruby-enterprise-1.8.7-2010.01/bin/ri --slave /usr/local/bin/testrb testrb /opt/ruby-enterprise-1.8.7-2010.01/bin/testrb

# 1.9.1 ruby

sudo update-alternatives --install /usr/local/bin/ruby ruby /opt/ruby-1.9.1-p378/bin/ruby 400 --slave /usr/local/bin/erb erb /opt/ruby-1.9.1-p378/bin/erb --slave /usr/local/bin/gem gem /opt/ruby-1.9.1-p378/bin/gem --slave /usr/local/bin/irb irb /opt/ruby-1.9.1-p378/bin/irb --slave /usr/local/bin/rake rake /opt/ruby-1.9.1-p378/bin/rake --slave /usr/local/bin/rdoc rdoc /opt/ruby-1.9.1-p378/bin/rdoc --slave /usr/local/bin/ri ri /opt/ruby-1.9.1-p378/bin/ri --slave /usr/local/bin/testrb testrb /opt/ruby-1.9.1-p378/bin/testrb 

# 1.2.0 RC2 jruby

sudo update-alternatives --install /usr/local/bin/ruby ruby /opt/jruby-1.2.0RC2/bin/jruby 500 --slave /usr/local/bin/gem gem /opt/jruby-1.2.0RC2/bin/jgem --slave /usr/local/bin/irb irb /opt/jruby-1.2.0RC2/bin/jirb --slave /usr/local/bin/rake rake /opt/jruby-1.2.0RC2/bin/rake --slave /usr/local/bin/rdoc rdoc /opt/jruby-1.2.0RC2/bin/rdoc --slave /usr/local/bin/ri ri /opt/jruby-1.2.0RC2/bin/ri --slave /usr/local/bin/testrb testrb /opt/jruby-1.2.0RC2/bin/testrb

hogyha az opt-ba vannak installálva a cuccok