升级Python2.6.6至2.7.5

1.查看当前Python版本

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# python -V
Python 2.6.6

2.下载Python2.7.5源码

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# wget http://python.org/ftp/python/2.7.5/Python-2.7.5.tgz

3.解压源代码包

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# tar xvf Python-2.7.5.tgz

4.进入解压目录并安装

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# cd Python-2.7.5
# ./configure
# make all
# make install
# make clean
# make distclean

5.将系统默认的python设置为python2.7.5

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# rm /usr/bin/python
# ln -s /usr/local/bin/python2.7 /usr/bin/python

6.检查Python版本

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# python -V
Python 2.7.5

7.解决yum不能运行的问题

因为yum是依赖python2.6.6运行的，所以需要对yum做一些修改

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# vim /usr/bin/yum

将第一行的#!/usr/bin/python修改为#!/usr/bin/python2.6