问题：用yum安装docker，更新yum存储时，报以下错误，导致yum坏了
[root@localhost yum.repos.d]# vi docker.repo [root@localhost yum.repos.d]# yum update Loaded plugins: fastestmirror, langpacks base | 3.6 kB 00:00 dockerrepo | 2.9 kB 00:00 extras | 3.4 kB 00:00 updates | 3.4 kB 00:00 dockerrepo/7/primary_db | 34 kB 00:00 Loading mirror speeds from cached hostfile * base: mirrors.cn99.com * extras: mirrors.aliyun.com * updates: mirrors.cn99.com No packages marked for update
解决方法：重新安装yum
[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps [root@localhost ~]# rpm -qa |grep yum [root@localhost ~]# wget http://centos.ustc.edu.cn/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm [root@localhost ~]# wget http://centos.ustc.edu.cn/centos/7/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm [root@localhost ~]# wget http://centos.ustc.edu.cn/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm [root@localhost ~]# rpm -ivh yum-* Preparing... ################################# [100%] Updating / installing... 1:yum-metadata-parser-1.1.4-10.el7 ################################# [ 33%] 2:yum-plugin-fastestmirror-1.1.31-4################################# [ 67%] 3:yum-3.4.3-154.el7.centos ################################# [100%] [root@localhost ~]# wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo [root@localhost ~]# yum makecache Loaded plugins: fastestmirror base | 3.6 kB 00:00 extras | 3.4 kB 00:00 updates | 3.4 kB 00:00 (1/8): extras/7/x86_64/other_db | 108 kB 00:00 (2/8): extras/7/x86_64/filelists_db | 636 kB 00:01 (3/8): updates/7/x86_64/prestodelta | 771 kB 00:01 (4/8): extras/7/x86_64/prestodelta | 102 kB 00:02 (5/8): updates/7/x86_64/other_db | 621 kB 00:00 (6/8): updates/7/x86_64/filelists_db | 3.5 MB 00:06 (7/8): base/7/x86_64/filelists_db | 6.7 MB 00:08 (8/8): base/7/x86_64/other_db | 2.5 MB 00:09 Loading mirror speeds from cached hostfile * base: mirrors.163.com * extras: mirrors.aliyun.com * updates: mirrors.cn99.com Metadata Cache Created