linux下安装python3

下载Python3

wget https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz

安装依赖

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

移动并j解压重命名

mv /usr/local/Python-3.6.6.tgz /usr/local/Python-3.6.6.tgz

mv Python-3.6.6.tgz python

tar -zxvf Python-3.6.6.tgz

 指定安装目录为/opt/python

./configure --prefix=/opt/python   # 指定安装目录为/opt/python36

把源码包里面的代码编译成linux服务器可以识别的代码

make && make install

添加环境变量

vi /etc/profile
最后一行添加

PATH=/opt/python/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

重启环境变量

source /etc/profile

输入python -V

默认打印python2.7

输入python3 -V

打印python3.6.6

-----------------安装成功---------------------