1、前提条件：安装软件包的时候，被我手动终止了
[root@dhcp yum.repos.d]# yum clean all
rpmdb: Thread/process 4541/140619363587840 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
CRITICAL:yum.main:
Error: rpmdb open failed
[root@dhcp yum.repos.d]# yum makecache
rpmdb: Thread/process 4541/140619363587840 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
CRITICAL:yum.main:

2、根据提示可以知道rpm数据库被损坏，如是按照下面的方法进行重建
[root@dhcp yum.repos.d]# cd /var/lib/rpm/
[root@dhcp rpm]# ls
Basenames__db.004NamePubkeysTriggername
ConflictnameDirnamesObsoletenameRequirename
__db.001FiledigestsPackagesRequireversion
__db.002GroupProvidenameSha1header
__db.003InstalltidProvideversionSigmd5
[root@dhcp rpm]#rm __db.* -rf
[root@dhcp rpm]#rpm --rebuilddb

[root@dhcp rpm]#yum clean all
Loaded plugins: aliases, changelog, downloadonly, kabi, presto, product-id,
: refresh-packagekit, security, subscription-manager, tmprepo,
: verify, versionlock
Updating certificate-based repositories.
Unable to read consumer identity
Loading support for Red Hat kernel ABI
Cleaning repos: rhel-source
Cleaning up Everything
0 delta-package files removed, by presto
[root@dhcp rpm]#yum update
Loaded plugins: aliases, changelog, downloadonly, kabi, presto, product-id,
: refresh-packagekit, security, subscription-manager, tmprepo,
: verify, versionlock
Updating certificate-based repositories.
Unable to read consumer identity
Loading support for Red Hat kernel ABI
rhel-source| 4.0 kB00:00 ...
rhel-source/primary_db| 3.1 MB00:00 ...
Setting up Update Process
No Packages marked for Update