centos安装Python3

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make

2、改名Python

    cd /usr/bin
    mv python python2.bak

3、下载并安装python3

    wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tar.xz
    tar -xf  Python-3.6.2.tar.xz
    cd Python-3.6.2
    ./configure prefix=/usr/local/python3
    make && make install

4、建立软链

    ln -s /usr/local/python3/bin/python3 /usr/bin/python

5、修改yum与urlgrabber-ext-down的Python头
将#! /usr/bin/python修改为#! /usr/bin/python2

vim /usr/bin/yum
vim /usr/libexec/urlgrabber-ext-down

centos安装Python3

原文：https://blog.51cto.com/hongtengfei/2361764