Get_OS_Version.sh

#!/bin/bash
Get_Dist_Name()
{
    if [ ! -f "/etc/issue" ];then
      grep -Eqi "macOS" /System/Library/CoreServices/SystemVersion.plist;
      DISTRO='APPLE'
      PM='brew'
    elif grep -Eqii "CentOS" /etc/issue || grep -Eq "CentOS" /etc/*-release; then
        DISTRO='CentOS'
        PM='yum'
    elif grep -Eqi "Red Hat Enterprise Linux Server" /etc/issue || grep -Eq "Red Hat Enterprise Linux Server" /etc/*-release; then
        DISTRO='RHEL'
        PM='yum'
    elif grep -Eqi "Aliyun" /etc/issue || grep -Eq "Aliyun" /etc/*-release; then
        DISTRO='Aliyun'
        PM='yum'
    elif grep -Eqi "Fedora" /etc/issue || grep -Eq "Fedora" /etc/*-release; then
        DISTRO='Fedora'
        PM='yum'
    elif grep -Eqi "Debian" /etc/issue || grep -Eq "Debian" /etc/*-release; then
        DISTRO='Debian'
        PM='apt'
    elif grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
        DISTRO='Ubuntu'
        PM='apt'
    elif grep -Eqi "Raspbian" /etc/issue || grep -Eq "Raspbian" /etc/*-release; then
        DISTRO='Raspbian'
        PM='apt'
    else
        DISTRO='unknow'
        PM='unknow'
    fi
    echo $DISTRO;
}
Get_Dist_Name