centos7安装python3.9

1.安装依赖

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 gcc

2.添加epel扩展源

yum -y install epel-release
yum -y install libffi-devel

yum install python-pip

3.下载python3源码

wget https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tar.xz

4.解压

tar -xf Python-3.9.6.tar.xz

5.配置

cd Python-3.9.6
./configure prefix=/usr/local/python3 --with-ssl

6.编译及安装

make && make install

7.添加软连接

ln -s /usr/local/python3/bin/python3.9 /usr/bin/python3

8.查看安装版本

python -V
python2 -V
python3 -V

9.查看软连接

cd /usr/bin
ll python*
ll pip*

10.添加pip3软连接

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3