原贴发表在我的个人博客上，转载请注明出处，谢谢。
因为禾斗石开需要，安装了中标麒麟高级服务器操作系统（虚拟化版）V6，然后该系统上部署了几个JAVA WEB项目，现在需要安装nginx，但是yum无法使用，出现以下异常信息：
Loaded plugins: refresh-packagekit, securityhttp://****: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"Trying other mirror.Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
修改yum源改为163
cd /etc/yum.repos.d/# 备份原有的源mv ns6-gen-x86_64.repo ns6-gen-x86_64.repo.old# 下载网易163的源wget http://mirrors.163.com/.help/CentOS6-Base-163.repomv CentOS6-Base-163.repo CentOS-Base.repo yum clean allyum makecache
但在 yum makecache报错：
http://mirrors.163.com/centos/6/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found"尝试其他镜像。错误：Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
这是因为无法访问 在$releasever参数，对于CentOS来说，$releasever来源于 rpm -qi centos-release 的version数值。
# 查询中标麒麟系统的版本cat /proc/versionLinux version 2.6.32-358.el6.x86_64 (mockbuild@ns60x64.cs2c.com.cn) (gcc version 4.4.7 20120313 (NeoKylin 4.4.7-3) (GCC) ) #1 SMP Fri Jul 12 10:25:19 CST 2013
对于中标麒麟高级服务器操作系统（虚拟化版）V6，经过测试，$releasever直接取 ** 6 ** 即可。
vim CentOS-Base.repo#vim命令模式下将所有的$releasever替换为6:1,s/$releasever/6/g# 再执行后续的指令yum clean allyum makecache
添加nginx的源
根据NGINX官方文档的安装方法：
To add NGINX yum repository, create a file named and paste one of the configurations below:
cd /etc/yum.repos.d/# 新建nginx.repo文件vim nginx.repo# 填写以下内容[nginx]name=nginx repobaseurl=http://nginx.org/packages/rhel/$releasever/$basearch/gpgcheck=0enabled=1
注意：$releasever和$basearch需要根据系统来确定，中标麒麟高级服务器操作系统（虚拟化版）V6最后确定为
安装pcre
尝试安装yum install nginx, 安装nginx时报错，因为nginx的rewrite需要pcre库。
./configure: error: the HTTP rewrite module requires the PCRE library.
安装pcre-devel解决问题
yum -y install pcre-devel
重新安装nginx依然出现错误提示：
./configure: error: the HTTP cache module requires md5 functionsfrom OpenSSL library. You can either disable the module by using–without-http-cache option, or install the OpenSSL library into the system,or build the OpenSSL library statically from the source with nginx by using–with-http_ssl_module –with-openssl=options.
安装openssl相关软件：
yum -y install openssl openssl-devel
安装pcre：
# 下载相应版本的pcrepcre-8.39.tar.bz2# 解包解压缩tar xjpf pcre-8.39.tar.bz2# 切换到pcre的目录cd pcre-7.8# 配置./configure --prefix=/usr/local/pcre-8.39 --libdir=/usr/local/lib/pcre --includedir=/usr/local/include/pcre
configure有许多参数可配，具体参见./configure –help及手册
# 编译及安装makemake install
安装nginx
最后尝试安装yum install nginx，完成。