误操作yum导致error: rpmdb解决方法

今天碰到一个问题就是yum 安装软件时会出现error:rpmdb错误，原因就是rpm数据库损坏。
错误：

    error: rpmdb: BDB0113 Thread/process 18967/139716328294400 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

解决方法（重新构建rpm数据库）：

    cd /var/lib/rpm
    ls
       Basenames __db.001 __db.003 Group Name Packages Requirename Sigmd5
       Conflictname __db.002 Dirnames Installtid Obsoletename Providename Sha1header Triggername
    rm -rf __db.*
    rpm --rebuilddb