Linux 安装 python3

Centos /redhat 安装 python3

https://www.cnblogs.com/kimyeee/p/7250560.html
http://www.cnblogs.com/Guido-admirers/p/6259410.html

1 下载依赖文件
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
2 下载Python3
wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tgz
3 解压Python文件
mkdir -p /usr/local/python3
tar zxvf Python-3.6.1.tgz
4 安装
cd Python-3.6.1
./configure --prefix=/usr/local/python3
make
make altinstall

5 修改旧版本 mv /usr/bin/python /usr/bin/python_bak
6 建立python3的链接 检查有时候是python3.6
ln -s /usr/local/python3/bin/python3 /usr/bin/python3

7 将 /usr/local/python3/bin 加入PATH
vim ~/.bash_profile

PATH=$PATH:$HOME/bin:/usr/local.python3/bin

修改完执行下面的命令。让上一步的修改生效
source ~/.bash_profile