1、问题
在CentOS下使用yum安装软件，结果出现了下面的错误提示：
# yum install
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
/usr/lib/python2.6/site-packages/pycurl.so: undefined symbol: CRYPTO_set_locking_callback
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, 09:37:14)
[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:
http://yum.baseurl.org/wiki/Faq
2、查看当前的环境变量
# env | grep LD
OLDPWD=/root
LD_LIBRARY_PATH=:/usr/local/lib
运行时链接库的目录被我设置成了这个/usr/local/lib。
取消这个运行时链接库试试：
# export -n LD_LIBRARY_PATH
# yum install busybox
已加载插件：fastestmirror
设置安装进程
Loading mirror speeds from cached hostfile
* base: mirrors.btte.net
* extras: mirrors.opencas.cn
* updates: mirror.bit.edu.cn
base | 3.7 kB 00:00
extras | 3.4 kB 00:00
updates | 3.4 kB 00:00
解决依赖关系
--> 执行事务检查
---> Package busybox.i686 1:1.15.1-21.el6_6 will be 安装
--> 完成依赖关系计算
.
.
.
果然是这个链接库的问题。
3、分析：
应该是yum依赖python的模块的模块。但是在进行加载的时候，找错目录了，结果就加载错了模块的链接库。