centos一键安装python3.x脚本

此脚本用来安装python3.x的版本，会自动解决安装高版本python,yum仓库不能使用的情况！

cat install_py.sh

#!/bin/bash
echo "which python version to install,default version is 3.8.5"
echo "put in 1 to select default version"
echo "put in 2 or otehr num to select other version "
read -p "install the default version:3.8.5 ? 1 or 2..." result
echo $result
if [ $? -eq 1 ];
then
	install_v="3.8.5"
else 
	
	while :
	do
		read -p "put in the version you want to install  " version
		curl https://www.python.org/ftp/python/$version/ |grep "404 Not Found"
		if [ $? -eq 0 ];
			echo "没有该版本"
			continue
		else
			install_v=$version
			break
		fi	
	done
fi
echo $install_v
yum -y install libffi-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make
wget https://www.python.org/ftp/python/$install_v/Python-$install_v.tgz
tar -axf Python-$install_v.tgz
cd Python-$install_v
./configure
make && make install
mv /usr/bin/python /usr/bin/python.old
#用于安装3开头的版本，如果是其他版本，下面的软连接的命令需要手动改一下
ln -s /usr/local/bin/python3  /usr/bin/python
sed -i 's#/usr/bin/python#/usr/bin/python2#g' /usr/bin/yum
sed -i 's#/usr/bin/python#/usr/bin/python2#g' /usr/libexec/urlgrabber-ext-down
python --version |grep $install_v  && echo "Installation succeeded" || echo "Installation failed"

如果有需要安装的小伙伴，直接在服务器新建一个文件把内容粘贴进去运行就可以

touch install_py.sh
sh install_py.sh