一、安装python

1、安装依赖环境

yum install gcc -y

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel

yum install zlib zlib-devel openssl -y

yum install openssl-devel -y

yum install libffi-devel -y

2、到官网下载Python包

进入官网（https://www.python.org/）点击downloads，再点击linux

 选择要下载的版本包

 或者使用wget方式下载

wget https://www.python.org/ftp/python/3.9.1/Python-3.9.1.tgz

3、将下载好的python包移到Linux下，然后解压

cd /usr/local
tar -zxvf Python-3.9.1.tgz

4、创建安装目录

mkdir /usr/local/python3.9/

5、进入解压后的目录，配置安装环境

cd /usr/local/Python-3.9.1
./configure --prefix=/usr/local/python3.9/

--prefix 参数是指定安装目录

6、编译并安装

make && make install