python centos7安装python3
目录
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
