使用yum 报错：Error: rpmdb open failed。遇到这个问题记录一下，解决方案来自网络文章

error: rpmdb: BDB0113 Thread/process 25455/140577707702272 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:

Error: rpmdb open failed

解决：

# 进入目录
cd /var/lib/rpm/

# 删除db文件
rm -f __db.*

# 重建db文件
rpm --rebuilddb

# 清除yum缓存
yum clean all