安装python2.7

1查看当前python版本
python -V

2下载新版本python
wget http://python.org/ftp/python/2.7.5/Python-2.7.5.tgz 

3解压
tar xvf Python-2.7.5.tgz

4安装
cd Python-2.7.5
./configure
make all
make install


5清理
make clean
make distclean

6挂链接
rm /usr/bin/python
ln -s /usr/local/bin/python2.7 /usr/bin/python


7解决yum问题
vim /usr/bin/yum