centos6下安装redmine1.2
参考文章： http://loosky.net/?p=1300
http://www.2cto.com/os/201110/106729.html
http://www.redmine.org/projects/redmine/wiki/HowTo_install_Redmine_on_CentOS_5
http://www.redmine.org/projects/redmine/wiki/HowTo_configure_Apache_to_run_Redmine
http://www.linuxdiyf.com/viewarticle.php?id=217353
http://docs.fedoraproject.org/en-US/Fedora/13/html/Security-Enhanced_Linux/sect-Security-Enhanced_Linux-Enabling_and_Disabling_SELinux-Disabling_SELinux.html
重点：virtualbox安装的centos6.0 webserver
1.ruby，rubygem可以用yum安装 默认ruby:1.8.7 gem:1.3.7
2.yum -y install zlib-devel curl-devel openssl-devel httpd-devel apr-devel apr-util-devel mysql-devel 这堆东西一定要装
3.rails用的2.3.11
4.webrick运行的话在虚拟机外访问非常慢，不知道为什么
5.使用apache运行，一定要把selinux关闭，否则无法改documentroot
