1.下载python3源码包

wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz

2.下载python3编译的依赖包

  yum install -y gcc patch libffi-devel python-devel  zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-deve

3.解压缩源码包

tar -zxvf Python-3.8.0.tgz

4.进入源码包文件夹

cd Python-3.8.0

5.编译且安装

./configure --prefix=/usr/bin/python38  # 指定安装目录为/usr/local/python38（新建文件）

6.编译

  make   # 相当于把源码包里面的代码编译成linux服务器可以识别的代码

7.编译安装,此步才会最终生成 /usr/local/python38/

  make install

8.进入/目录查看python38文件夹,我们要的python3都在这里了

   /usr/bin/python38/bin/python3
   /usr/bin/python38/python36/bin/pip3
  .....

9.更改linux的path变量，添加python3 

vim  /etc/profile
PATH=.:/usr/bin/python38/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

10.为了永久生效path设置，添加到/etc/profile全局环境变量配置文件中 重载配置文件/etc/profile

source /etc/profile

 11.挂起服务后台运行

nohup python3 xxxx.py 1>result.txt 2>error.txt &

12.停止服务 

ps -aux|grep XXX               kill  -9 进程号