看能不能ping 通www.baidu.com来排查是否dns ,当然得之前在浏览器能访问www.baidu.com
再更新yum仓库试试 yum update –y
https://www.aliyun.com/jiaocheng/159754.html(换国内yum源)
注意防火墙问题
yum clean all 解决了 All mirror URLs are not using ftp, http[s] or file
https://jingyan.baidu.com/article/09ea3ede3ed193c0aede3937.html
https://blog.csdn.net/zhousenshan/article/details/53140979
CentOS-5的yum源无法使用问题
[root@37wan ~]# yum -y install gcc
Loaded plugins: fastestmirror
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/
removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base
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可以看出:URLs不是ftp或http地址,打开yum查看:
[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
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[root@ yum.repos.d]# wget mirrorlist=http://mirrorlist.centos.org/6release=$releasever&arch=$basearch&repo=os
[1] 4853
[2] 4854
[root@ yum.repos.d]# mirrorlist=http://mirrorlist.centos.org/6release=: Unsupported scheme.
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即源的网址有问题。
更新文件内容,用以下内容替换:
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=http://vault.centos.org/5.11/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
baseurl=http://vault.centos.org/5.11/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
baseurl=http://vault.centos.org/5.11/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
#baseurl=http://mirror.centos.org/centos/$releasever/centosplus/$basearch/
baseurl=http://vault.centos.org/5.11/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
#baseurl=http://mirror.centos.org/centos/$releasever/contrib/$basearch/
baseurl=http://vault.centos.org/5.11/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5</span></strong></span>
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修改文件后,清空yum源缓存:
yum clean all #清空yum源缓存
yum makecache #从新加载新缓存
用国内的yum源会出现一下问题,用上述解决办法,也ok,虽然会有一个连接报错
http://mirrors.aliyun.com/centos/5/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found
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用浏览器打开http://mirrors.aliyun.com/centos/5/os/x86_64/repodata/repomd.xml,根本找不到这个文件,163……也是,但是Centos6内有,说明国内也不知Centos5了!