centos 安装python2.7

自带的是python2.6版本，现阶段需要 安装pyhdfs使用python操作hdfs，所以需要2.7及以上版本

1）安装devtoolset

yum groupinstall "Development tools"

2）安装编译Python需要的包包

yum install zlib-devel
yum install bzip2-devel
yum install openssl-devel
yum install ncurses-devel
yum install sqlite-devel

3）下载并解压Python 2.7.9的源代码

cd /opt
wget --no-check-certificate https://www.python.org/ftp/python/2.7.9/Python-2.7.9.tar.xz
tar xf Python-2.7.9.tar.xz
cd Python-2.7.9

4）编译与安装Python 2.7.9

./configure --prefix=/usr/local
make && make altinstall

5）将python命令指向Python 2.7.9

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

6）检查Python版本

sh
sh-4.1# python -V
Python 2.7.9