[centos] yum 源更新

下载 repo 文件

wget http://mirrors.aliyun.com/repo/Centos-7.repo[/code] 
网易源

wget http://mirrors.163.com/.help/CentOS7-Base-163.repo[/code] 
备份并替换系统的 repo 文件
1. `cd /etc/yum.repos.d/ `
2. `cp /root/Centos-7.repo /etc/yum.repo.d/`
3. `mv CentOS-Base.repo CentOS-Base.repo.bak`
4. `mv Centos-7.repo CentOS-Base.repo`


执行 yum 源更新命令
1. `yum clean all `
2. `yum makecache `
3. `yum update`


利用 centos 系统自带的 yum 命令安装、升级所需的程序库
LANG=C

yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers

添加 yun 不存在的源
例如添加 nginx 源

rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm[/code] 
注：nginx 源地址 http://nginx.org/packages/centos/7/noarch/RPMS/

使用下面命令安装 nginx

yum install nginx


启动 nginx

service nginx start
 或 
systemctl start nginx.service


设置 nginx 开机启动

chkconfig nginx on