Installing Ruby on Rails on Red Hat Enterprise Linux 4

Determine what Ruby RPMs are installed:

$ rpm -qa | egrep '(ruby)|(irb)'
ruby-libs-1.8.1-7.EL4.2

Uninstall Ruby RPMs:

$ sudo rpm -e ruby-libs-1.8.1-7.EL4.2

Install Ruby from source:

$ wget ftp://ftp.ruby-lang.org/pub/ruby/ruby-1.8.6-p114.tar.gz$ tar xvfz ruby-1.8.6-p114.tar.gz
$ cd ruby-1.8.6-p114
$ ./configure --prefix=/usr (the default prefix is /usr/local)
$ make
$ make test
$ sudo make intall

Install Ruby Gems:

$ wget http://rubyforge.org/frs/download.php/29548/rubygems-1.0.1.tgz
$ tar xvfz rubygems-1.0.1.tgz
$ cd rubygems-1.0.1
$ sudo ruby setup.rb

Install Rails:

$ sudo gem update
$ sudo gem update --system
$ sudo rm `gem env gempath`/source_cache
$ rm -f ~/.gem/source_cache
$ sudo gem update
$ sudo gem install rails -v 1.1.6
$ sudo gem install rails -v 1.2.6
$ sudo gem install rails (if you want the latest version, 2.0.2)

Install Capistrano:

$ sudo gem install capistrano

Install Mongrel:

$ sudo gem install mongrel
$ sudo gem install mongrel_cluster

Install Memcache Client:

$ sudo gem install memcache-client