#安装编译环境

yum groupinstall "Development tools"

或者

yum install gcc gcc-c++ gcc-g77 flex bison autoconf automake bzip2-devel zlib-devel ncurses-devel libjpeg-devel libpng-devel libtiff-devel freetype-devel pam-devel openssl-devel libxml2-devel gettext-devel pcre-devel

#删除已经安装的项目：

yum erase ruby ruby-libs ruby-mode ruby-rdoc ruby-irb ruby-ri ruby-docs

#安装依赖：

yum -y install zlib-devel curl-devel openssl-devel httpd-devel apr-devel apr-util-devel mysql-devel

#下载Ruby源码并解压缩：

tar zxvf ruby-1.9.3.pXXX.tar.gz

#编译安装：

cd ruby-1.9.3.pXXX

./configure

make && make install

#检查安装：

ruby -v

ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]

radhat/centos 下编译安装ruby