CentOS6.2 install Redmine and use the method described in this article to successfully install ruby. The following describes how to install ruby. 1. delete old ruby, yum erase ruby-libs ruby-mode ruby-rdoc ruby-irb ruby-ri ruby-docs 2 wget http://nodejs.org/dist/v0.6.6/node-v0.6.6.tar.gz wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz wget http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz wget http://www.sqlite.org/sqlite-autoconf-3070900.tar.gz3 wget install some basic packages yum install openssl-devel zlib -devel gcc-c ++ make autoconf readline-devel curl-devel expat-devel gettext-devel4 install Node tar-zxf node-v0.6.6.tar.gz cd node-v0.6.6. /configure make install5 install yaml tar-zxf yaml-0.1.4.tar.gz cd yaml-0.1.4. /configure -- prefix =/usr/local make install6 install ruby tar-zxf ruby-1.9.3-p0.tar.gz cd ruby-1.9.3-p0. /configure -- prefix =/usr/local -- enable-shared -- enable-pthread -- disable-install-doc -- with-opt-dir =/usr/local/lib make install7 Installation rails gem install rails8 yum install ruby-devel yum install sqlite-devel9 install sqlite3 tar-zxf sqlite-autoconf-3070900.tar.gz cd sqlite-autoconf-3070900. /configure make install