在Centos 7.2执行下列命令yum install -y gcc libaio-devel spice-server-devel spice-protocol-devel ceph-devel libiscsi-devel pixman-devel zlib-devel glib2-devel libusbx-devel.x86_64 libcap-devel glusterfs-api-devel glusterfs-devel glusterfs-devel libfdt-devel libfdt-devel gcc-c++ 之后无法使用yum以及rpm命令，报错信息为：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, Aug 4 2017, 00:39:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]
If you cannot solve this problem yourself, please go to the yum faq at: http://yum.baseurl.org/wiki/Faq
您在 /var/spool/mail/root 中有新邮件
另外，网上说的下载后执行的命令，也尝试过，无效。 rpm2cpio nspr-4.13.1-1.0.el7_3.x86_64.rpm | cpio -idmv LD_PRELOAD=/usr/lib64/libnspr4.so yum update nspr
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