CentOS中执行`yum update`时，会报如下错误： ~~~shell Loaded plugins: fastestmirror, refresh-packagekit, security Setting up Update Process Determining fastest mirrors YumRepo 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.txt Error: Cannot find a valid baseurl for repo: base ~~~ 这是因为在CentOS 6在2020年11月30过后，就不在维护了，使用如下方法解决： 1. 进入`/etc/yum.repos.d/` ~~~shell # cd /etc/yum.repos.d/ ~~~ 2. 编辑`CentOS-Base.repo` ~~~shell # 先备份 # cp CentOS-Base.repo CentOS-Base.repo.old # 编辑 # vim CentOS-Base.repo ~~~ 3. 注释mirrorlist 替换 baseurl，需要编辑如下几个块 * \[base\] * \[updates\] * \[extras\] 内容如下： ~~~shell [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/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 # released updates [updates] name=CentOS-$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=1 gpgkey=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=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 ~~~ 4. 清楚缓存 ~~~shell # yum clean all ~~~ 5. 重新执行更新 ~~~shell # yum update ~~~