解决Couldn't resolve host 'mirrorlist.centos.org

今天在linux环境通过yum安装软件报了以下错误：

		
								[root@multi-mysql yum.repos.d]# yum install ncurses devel -y

								Loaded plugins: fastestmirror, security

								Loading mirror speeds from cached hostfile

								Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was

								14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'"

								Error: Cannot find a valid baseurl for repo: base

从字面意义上看是不能解析mirrorlist.centos.org这个地址，应该是跟dns网络配置有关系，最后解决方法是在DNS域名解析的配置文件增加DNS服务器的IP地址：

		
								[root@multi-mysql ~]# vim /etc/resolv.conf

								nameserver 8.8.8.8

								nameserver 202.106.0.20

重启网络服务

		
								[root@multi-mysql ~]# /etc/init.d/network restart

								Shutting down interface eth0:                              [  OK  ]

								Shutting down loopback interface:                          [  OK  ]

								Bringing up loopback interface:                            [  OK  ]

								Bringing up interface eth0:  Determining if ip address 192.168.1.202 is already in use for device eth0...

								                                                           [  OK  ]

重新yum安装，正常

		
								[root@multi-mysql ~]# yum install nmap -y

								Loaded plugins: fastestmirror, security

								Loading mirror speeds from cached hostfile

								 * base: mirrors.yun-idc.com

								 * extras: mirrors.yun-idc.com

								 * updates: mirrors.yun-idc.com

								base                                                                                                         | 3.7 kB     00:00     

								base/primary_db                                                                                              | 4.6 MB     00:01     

								extras                                                                                                       | 3.4 kB     00:00     

								extras/primary_db                                                                                            |  33 kB     00:00     

								updates                                                                                                      | 3.4 kB     00:00     

								updates/primary_db                                                                                           | 2.6 MB     00:00     

								Setting up Install Process

								Resolving Dependencies

								--> Running transaction check

								---> Package nmap.x86_64 2:5.51-4.el6 will be installed

								--> Finished Dependency Resolution

								......此处省略

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解决Couldn't resolve host 'mirrorlist.centos.org