YUM安装时出现[Errno 14]错误

 YUM安装时出现[Errno 14] PYCURL ERROR 6-"Couldn't resolve host 'mirrors.163.com'"

 

CentOS 6.2系统使用YUM安装vsftpd时出现如下错误：

#yum install vsftpd

Loaded plugins: aliases, changelog, downloadonly, fastestmirror, kabi, presto, security, tmprepo, verify, versionlock

Loading support for CentOS kernel ABI

Determining fastest mirrors 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’”

…..省略……..

http://mirrors.163.com/centos/6.2/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 – “Couldn’t resolve host ‘mirrors.163.com’”

Trying other mirror.

Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again

…省略……

查了好多文档都说是dns的问题，但是我的dns设置了3个：

 

DNS解析也都是正常的，怎么就不对呢

 

发现是用61.139.2.69解析的，我尝试在/etc/resolve.conf中将第一个dns 119.6.6.6注释掉，然后再用yum命令就恢复正常了：

 

好奇怪，原来以为YUM更新会逐一尝试每个DNS，现在看来只要/etc/resolve.conf中的第一个DNS不能解析，YUM就不再尝试下一个了。