version_compare()
{
    source=(${1//./ })
    target=(${2//./ })
    for ((i=0; i<${#source[@]}; i++)); do
        if [[ ${source[i]} == ${target[i]} ]]; then
            continue
        fi

        if [[ ${source[i]} -lt ${target[i]} ]]; then
            echo -1
            return
        elif [[ ${source[i]} -gt ${target[i]} ]]; then
            echo 1
            return
        fi
    done
    echo 0
}

getSystemVersion()
{
    releasetmp=`cat /etc/redhat-release | awk -Frelease '{print $2}' | awk -F. '{print $1}' | awk '{print $1}'`
    echo $releasetmp
}