很多小伙伴可能发现了，以前在CentOS 6的机器上应用yum 装置软件还是失常的，可是最近却无奈应用了。个别都会报上面这样的谬误：
[root@665daec6fea1 ~]# yum install aprLoaded plugins: fastestmirror, ovlSetting up Install ProcessLoading mirror speeds from cached hostfileYumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txtError: Cannot find a valid baseurl for repo: base应用yum update命令也是一样：
[root@665daec6fea1 ~]# yum updateLoaded plugins: fastestmirror, ovlSetting up Update ProcessLoading mirror speeds from cached hostfileYumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txtError: Cannot find a valid baseurl for repo: base看谬误提醒，仿佛是说找不到无效的baseurl。所以要解决这个问题，还要从baseurl着手。
从官网邮件可知，CentOS 6自从2020年11月30日开始，官网不再保护，所以连带着原来的yum存储库也不能用了。
然而邮件里说得很明确，它给出了迁徙后的存储库的链接地址，这时候咱们只须要更新yum存储库的镜像列表，就能够失常应用了。
步骤如下：
进入到/etc/yum.repos.d目录下：
cd /etc/yum.repos.d备份原来的CentOS-Base.repo文件：
cp CentOS-Base.repo CentOS-Base.repo.old批改CentOS-Base.repo文件：
vi CentOS-Base.repo次要批改内容如下：
[base]name=CentOS-$releasever - Base# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/baseurl=https://vault.centos.org/6.10/os/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6# released updates[updates]name=CentOS-$releasever - Updates# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/baseurl=https://vault.centos.org/6.10/updates/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6# additional packages that may be useful[extras]name=CentOS-$releasever - Extras# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra# baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/baseurl=https://vault.centos.org/6.10/extras/$basearch/gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6清理yum 缓存
yum clean all执行 yum update
yum update再次装置胜利：
[root@665daec6fea1 ~]# yum install aprLoaded plugins: fastestmirror, ovlSetting up Install ProcessLoading mirror speeds from cached hostfileYumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/YumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/YumRepo Error: All mirror URLs are not using ftp, http[s] or file. Eg. Invalid release/repo/arch combination/Resolving Dependencies--> Running transaction check---> Package apr.x86_64 0:1.3.9-5.el6_9.1 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================================================ Package Arch Version Repository Size================================================================================================================Installing: apr x86_64 1.3.9-5.el6_9.1 base 124 kTransaction Summary================================================================================================================Install 1 Package(s)Total download size: 124 kInstalled size: 296 kIs this ok [y/N]: yDownloading Packages:apr-1.3.9-5.el6_9.1.x86_64.rpm | 124 kB 00:00 Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning Transaction Installing : apr-1.3.9-5.el6_9.1.x86_64 1/1 /sbin/ldconfig: /usr/lib/libcriterion.so.3 is not a symbolic link/sbin/ldconfig: /usr/lib64/libcriterion.so.3 is not a symbolic link Verifying : apr-1.3.9-5.el6_9.1.x86_64 1/1 Installed: apr.x86_64 0:1.3.9-5.el6_9.1 Complete!至此，功败垂成。