yum安装出现错误
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yum安装出现错误:
[root@cdh205 network-scripts]# yum -y install ntp
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.163.com
* updates: mirrors.163.com
Resolving Dependencies
--> Running transaction check
---> Package ntp.x86_64 0:4.2.6p5-28.el7.centos will be installed
--> Processing Dependency: libopts.so.25()(64bit) for package: ntp-4.2.6p5-28.el7.centos.x86_64
--> Running transaction check
---> Package autogen-libopts.x86_64 0:5.18-5.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
==================================================================================
Package Arch Version Repository Size
==================================================================================
Installing:
ntp x86_64 4.2.6p5-28.el7.centos base 549 k
Installing for dependencies:
autogen-libopts x86_64 5.18-5.el7 base 66 k
Transaction Summary
==================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 615 k
Installed size: 1.5 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
autogen-libopts-5.18-5.el7.x86 FAILED
http://ftp.sjtu.edu.cn/centos/7.5.1804/os/x86_64/Packages/autogen-libopts-5.18-5.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: ftp.sjtu.edu.cn; Unknown error"
Trying other mirror.
ntp-4.2.6p5-28.el7.centos.x86_ FAILED
http://ftp.sjtu.edu.cn/centos/7.5.1804/os/x86_64/Packages/ntp-4.2.6p5-28.el7.centos.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: ftp.sjtu.edu.cn; Unknown error"
Trying other mirror.
autogen-libopts-5.18-5.el7.x86 FAILED
http://mirrors.huaweicloud.com/repository/centos/7.5.1804/os/x86_64/Packages/autogen-libopts-5.18-5.el7.x86_64.rpm: [Errno 14] curl#6 - "Could not resolve host: mirrors.huaweicloud.com; Unknown error"
Trying other mirror.
autogen-libopts-5.18-5.el7.x86 FAILED
http://mirrors.aliyun.com/centos/7.5.1804/os/x86_64/Packages/autogen-libopts-5.18-5.el7.x86_64.rpm:
.....
Error downloading packages:
autogen-libopts-5.18-5.el7.x86_64: [Errno 256] No more mirrors to try.
ntp-4.2.6p5-28.el7.centos.x86_64: [Errno 256] No more mirrors to try.
- 报错信息,没有配置域名解析。为了验证,可以
ping www.baidu.com
网站进行检测。
- 解决方法:CentOS 7中DNS地址解析配置是下的文件是/etc/resolv.conf,但是我们不应该对其直接配置,而是应该使用
systemctl restart network
命令,它会根据文件/etc/sysconfig/network-scripts/ifcfg-eth0自动生成etc/resolv.conf。