今天在学习docker课程时， 在自己的云服务器上，尝试安装docker报了以下错误
[root@VM-0-3-centos ~]# yum remove docker \
> docker-client \
> docker-client-latest \
> docker-common \
> docker-latest \
> docker-latest-logrotate \
> docker-logrotate \
> docker-engine
error: rpmdb: BDB0113 Thread/process 10672/140237337782336 failed: BDB1507 Thread died in Berkeley DB library
error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db5 - (-30973)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:后台经过查询出解决方案如下：，这里记录一下，以防后续类似问题出现。虽然还不知道原理是啥。
[root@VM-0-3-centos ~]# cd /var/lib/rpm
[root@VM-0-3-centos rpm]# ls
Basenames __db.001 __db.003 Group Name Packages Requirename Sigmd5
Conflictname __db.002 Dirnames Installtid Obsoletename Providename Sha1header Triggername
[root@VM-0-3-centos rpm]# rm -rf __db*
[root@VM-0-3-centos rpm]# rpm --rebuilddb