今天安装 Oracle 依赖的时候，不小心连带升级了 nss-softokn-freebl，导致 yum 和 rpm 命令执行的时候报 Failed to initialize NSS library 的错误：

依赖安装过程中顺带将 nss-softokn-freebl 也升级了

问题重现

# 执行 yum 报错
[root@three30 sbin]#  yum -y install gcc
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.

解决方案

根据红帽官方提供的解决方案，解决办法如下：

wget /upload/wp/MyUploads/libnspr4.so.tar
tar xf libnspr4.so.tar
sudo mv libnspr4.so /usr/lib64/
sudo yum install glibc.i686 nspr