CentOS7.6_64 升级python

1：#升级前的准备工作,安装wget和3.6的tar包

yum -y install wget 

mkdir /usr/local/python3 

cd /usr/local/python3

wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz

tar xvf Python-3.6.3.tgz 

cd Python-3.6.3

./configure --prefix=/usr/local/python3

make && make install 

2：#备份python2.7 版本

cd /usr/bin

ll python*

mv python python.bak

3：#安装python3

cd /usr/bin

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

vim /usr/bin/yum

修改#!/usr/bin/python 为/usr/bin/python2.7

vim /usr/libexec/urlgrabber-ext-down 

修改#!/usr/bin/python 为/usr/bin/python2.7

测试yum 成功