升级wordpress发现502，于是查找接近方式，有人提出执行如下命令
mv /usr/lib64/libsqlite3.so.0.8.6 /usr/lib64/libsqlite3.so.0.8.6.bak
当时并未发现异常，但是当需要git pull时，发现提示如下
fatal: unable to access ‘xxxx’: Problem with the SSL CA cert (path? access rights?)
尝试各种解决方式，当尝试如下方法时
yum update -y nss curl libcurl
发现提示
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
No module named sqlite
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:
2.6.6 (r266:84292, Jan 22 2014, 09:42:36)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]
If you cannot solve this problem yourself, please go to
the yum faq at:
于是怀疑是之前操作引起的问题，恢复后可以pull
