yum和rpm都壞了命令使用不了

問題：安裝oracle相關連的包時導致yum和rpm都壞了，命令使用不了，出現如下錯誤提示：
error: Failed to initialize NSS library
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

cannot import name ts

Please install a package which provides this module, or
verify that the module is installed correctly.

It‘s possible that the above module doesn‘t match the
current version of Python, which is:
2.7.5 (default, Nov 20 2015, 02:00:19)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)]

If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq

[root@localhost yum.repos.d]# yum whatprovides libstdc++.so.6

error: Failed to initialize NSS library
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

cannot import name ts

Please install a package which provides this module, or
verify that the module is installed correctly.

It‘s possible that the above module doesn‘t match the

current version of Python, which is:
2.7.5 (default, Nov 20 2015, 02:00:19)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)]

If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq

個人嘗試源碼編譯重裝nss、gcc、python、yum都不管用，就差重裝系統了。

最後解決方案：

1、下載nspr（nspr-4.13.1-1.0.el7_3.x86_64.rpm）包，鏈接：http://mirror.centos.org/centos/7/os/x86_64/Packages/nspr-4.13.1-1.0.el7_3.x86_64.rpm

2、執行命令：rpm2cpio nspr-4.13.1-1.0.el7_3.x86_64.rpm | cpio -idmv

3、執行命令：LD_PRELOAD=./usr/lib64/libnspr4.so yum update nspr

問題解決。
如果還報錯：
可以將export LD_PRELOAD=/usr/lib64/libnspr4.so寫入/etc/profile，然後再source /etc/profile

註意： 避免安裝相關的glibc.i686包，否則會導致yum、rpm損壞

Centos7 error: Failed to initialize NSS library