在使用rpm -ivh gcc-4.4.7-4.el6.x86_64.rpm命令安装GCC时，提示以下错误：
rpmdb: Thread/process 3343/139858349385472 failed: Thread died in Berkeley DB library error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages index using db3 - (-30974) error: cannot open Packages database in /var/lib/rpm warning: gcc-4.4.7-4.el6.x86_64.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY rpmdb: Thread/process 3343/139858349385472 failed: Thread died in Berkeley DB library error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages database in /var/lib/rpm
解决方法：
执行以下命令即可搞定：
rm -rf /var/lib/rpm/__db*