python centos7安装python3

目录

• python centos7安装python3
  • 安装前准备
  • 安装依赖包
  • 添加epel扩展源
  • 安装pip
  • 用pip装wget
  • 下载python3
  • 编译python3源码包，解压
  • 编译
  • 安装依赖zlib、zlib-deve
  • 添加软链接，将原来的链接备份
  • 添加软连接
  • 验证

python centos7安装python3

centos7默认的python版本是2.7，现在想升级python3，同时保留python2.7

官网下载地址： https://www.python.org/ftp/python/

安装前准备

//执行
which python |xargs ls -l
//可以看到指向了Python2
lrwxrwxrwx 1 root root 7 Sep  9 17:44 /usr/bin/python -> python2

安装依赖包

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

添加epel扩展源

yum -y install epel-release

安装pip

yum -y install python-pip

用pip装wget

pip install wget

下载python3

用wget下载python3的源码包，或者自己先下载好，上传到服务器再安装，如果网络快可以直接安装

wget https://www.python.org/ftp/python/3.6.8/Python-3.6.8.tar.xz

编译python3源码包，解压

xz -d Python-3.6.8.tar.xz 
tar -xf Python-3.6.8.tar

编译

进入解压后的目录，依次执行下面命令进行手动编译

cd Python-3.6.8
./configure prefix=/usr/local/python3
make && make install

安装依赖zlib、zlib-deve

yum -y install  zlib zlib-devel

添加软链接，将原来的链接备份

mv /usr/bin/python /usr/bin/python.bak

添加软连接

ln -s /usr/local/python3/bin/python3.6 /usr/bin/python

验证

python -V