on ubuntu 8.04, rails-2.0.2 as default ,now i want to instal rails-1.2.6 first i have download these gem packages and install all of then successfully include rails-1.2.6 activesupport-1.4.4.gem, activerecord-1.15.6.gem, actionpack-1.13.6.gem, actionmailer-1.3.6.gem, rails-1.2.6.gem
but even installing was finished successfully and when i try to create new application using rails-1.2.6 i have got the following massage "The program 'rails' is currently not installed. You can install it by typing: apt-get install rails bash: rails: command not found" i have installed the rails-1.2.6. but in massage said not installed ,so anybody can help .thanks