重启系统后yum无法使用：CRYPTO_set_locking_callback

如题，重装系统后发现yum报错：

[root@abc DMS]# yum install vim
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   /usr/lib64/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, Sep  4 2013, 07:46:00) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]

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

[root@abc DMS]#

本着有事找百度的原则，找到大佬微博：https://www.cnblogs.com/joeone/p/9253453.html

查看依赖：

[root@abc DMS]# ldd /usr/lib64/python2.6/site-packages/pycurl.so
    linux-vdso.so.1 =>  (0x00007fffd97ff000)
    libcurl.so.4 => /home/vie61jiexiang/lwj/ISA50_OFF_1016/isakits/bin64/libcurl.so.4 (0x00007f36cbe2f000)
    libpython2.6.so.1.0 => /usr/lib64/libpython2.6.so.1.0 (0x00007f36cba78000)
    libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f36cb85b000)
    libc.so.6 => /lib64/libc.so.6 (0x00007f36cb4c7000)
    libz.so.1 => /lib64/libz.so.1 (0x00007f36cb2b0000)
    librt.so.1 => /lib64/librt.so.1 (0x00007f36cb0a8000)
    libdl.so.2 => /lib64/libdl.so.2 (0x00007f36caea4000)
    libutil.so.1 => /lib64/libutil.so.1 (0x00007f36caca0000)
    libm.so.6 => /lib64/libm.so.6 (0x00007f36caa1c000)
    /lib64/ld-linux-x86-64.so.2 (0x0000003a84a00000)
[root@abc DMS]#

libcurl.so.4指向了新安装的软件的库文件，那就把新安装软件的库文件换成系统自带的试下：

[root@abc DMS]# 
[root@abc DMS]# cd /home/vie61jiexiang/lwj/ISA50_OFF_1016/isakits/bin64/
[root@abc bin64]# cp libcurl.so.4 libcurl.so.4.bak
[root@abc bin64]# 
[root@abc bin64]# rm -rf libcurl.so.4
[root@abc bin64]# 
[root@abc bin64]# ln -s /usr/lib64/libcurl.so.4.1.1 ./
[root@abc bin64]# cp /usr/lib64/libcurl.so.4.1.1 ./libcurl.so.4

然后测试yum：

[root@abc bin64]# yum install vim
Loaded plugins: product-id, refresh-packagekit, security, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
base                                                                                                   | 3.9 kB     00:00 ... 
Not using downloaded repomd.xml because it is older than what we have:
  Current   : Mon Nov 10 23:29:40 2014
  Downloaded: Tue Nov 12 03:16:28 2013
Setting up Install Process
Package 2:vim-enhanced-7.2.411-1.8.el6.x86_64 already installed and latest version
Nothing to do
[root@abc bin64]#

恢复了。。。。

记得检查安装的软件是不是正常使用。。。