yum update
error: rpmdb: BDB0113 Thread/process 17541/140186325928000 failed: BDB1507 Threa d died in Berkeley DB library
error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal erro r, 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
处理方法：
cd /var/lib/rpm
rpm --rebuilddb然后yum操作就可以用了。