CentOS 5.3 通过yum命令自动安装升级程序

1、首先让CentOS服务器可以连上外网2、[root@mailserver yum.repos.d]# pwd
   /etc/yum.repos.d
   [root@mailserver yum.repos.d]# cp CentOS-Base.repo CentOS-Base.repo.bak3、将CentOS-Base.repo修改为以下内容，或者将以下内容保存为CentOS-Base.repo文件，上传至/etc/yum.repos.d目录替换原来的文件# CentOS-Base.repo
#
# This file uses a new mirrorlist system developed by Lance Davis for CentOS.
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#[base]
name=CentOS-$releasever - Base
baseurl=http://centos.ustc.edu.cn/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://centos.ustc.edu.cn/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
baseurl=http://centos.ustc.edu.cn/centos/$releasever/addons/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://centos.ustc.edu.cn/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-5#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://centos.ustc.edu.cn/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://centos.ustc.edu.cn/centos/RPM-GPG-KEY-CentOS-53、下载rpmforge-release-0.3.6-1.el5.rf.i386.rpm   [root@mailserver temp]# wget http://apt.sw.be/RedHat/el5/en/i386/RPMS.dag/rpmforge-release-0.3.6-1.el5.rf.i386.rpm4、导入这个网站的“下载公匙“，命令 rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt5、再通过rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm安装6、安装之后，就可以通过     yum -y install gcc     yum -y install gcc-c++     yum会自动查找软件的相关依赖包，自动下载安装，全过程轻松愉快。特此记录一下。Linux 删除软连接Nessus 4.4 在VMware Linux下不能正确扫描的问题和测试相关资讯 CentOS教程

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