1、Centos升級後，pip時會報如下錯誤：

Traceback (most recent call last):
  File "./pip", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/opt/soft/distribute-0.7.3/pkg_resources.py", line 2989, in <module>
    working_set.require(__requires__)
  File "/opt/soft/distribute-0.7.3/pkg_resources.py", line 726, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/opt/soft/distribute-0.7.3/pkg_resources.py", line 624, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: pip==1.5.5
 

是因為python升級後版本不對應的原因，需要重新安裝pip。

2、

CentOS 升級Python2.7後， yum出現“No module named yum”錯誤：

由於yum命令不相容python2.7，需修改/usr/bin/yum檔案，將第一行由“#!/usr/bin/python”改為“#!/usr/bin/python2.6"，而“#!/usr/bin/python”的軟連結是python2.7。