shell脚本自动创建 python3

#阿里云：centos7.3
#wget https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tgz
#定义...
PYTHON_PATH="/usr/local/python36"
set -e
set -x
#身份检查
if [ $(id -u) != "0" ]; then
    echo "error: user must be an administrator"
    exit;
fi
#依赖
yum install gcc gcc-c++ kernel-devel kenel-headers make bzip2  readline readline-devel readline-static  openssl openssl-devel openssl-static sqlite-devel gdbm-devel bzip2-devel xz-devel tk-devel  bzip2-libs patch vim git ncurses-devel  -y

#判断是否有源码包
[ -s Python-3.6.3.tgz ] || exit 1
tar xf Python-3.6.3.tgz
cd Python-3.6.3
./configure --prefix=${PYTHON_PATH} && make && make install

ln -s ${PYTHON_PATH}/bin/python3.6 /usr/bin/python3
ln -s ${PYTHON_PATH}/bin/pip3 /usr/bin/pip3
ln -s ${PYTHON_PATH}/bin/pyvenv-3.6 /usr/bin/pyvenv3

function move_old() {
    cd /usr/bin
    mv python python27
    mv pip pip27
    
    sed -i "s|#!/usr/bin/python|#!/usr/bin/python27|" /usr/bin/yum
    sed -i "s|#!/usr/bin/python|#!/usr/bin/python27|" /usr/libexec/urlgrabber-ext-down
    
    mv python3 python
    mv pip3 pip
    mv pyvenv3 pyenv
}
move_old   #将旧版本替换并尽量保持py2对其他软件的的兼容性
echo "export PATH="${PYTHON_PATH}/bin/:$PATH"">>/etc/profile
source /etc/profile

exit 0