centos卸载自带的Python3.6.8 安装指定的版本号

#卸载python3
rpm -qa|grep python3|xargs rpm -ev --allmatches --nodeps 

#删除所有残余文件
whereis python3 |xargs rm -frv

#查看现有安装的python，验证是否删除干净
whereis python 

# 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 libffi-devel

# 下载安装包
# wget https://www.python.org/ftp/python/{version}/Python-{version}.tar.xz
# {version}指定版本号 3.9.7

wget "https://www.python.org/ftp/python/3.7.9/Python-3.7.9.tgz"

# 解压
tar -zxvf Python-3.7.9.tgz

# 进入解压目录
cd Python-3.7.9

# 配置
./configure --prefix=/usr/local/python3

# 编译
make

# 安装
make install

# 建立软连接
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3