post_install() {
    /usr/bin/getent group kalu >/dev/null 2>&1 ||  usr/sbin/groupadd -g 214 kalu &>/dev/null
}

post_upgrade() {
    post_install
}

post_remove() {
    if /usr/bin/getent group kalu >/dev/null 2>&1; then
        /usr/sbin/groupdel kalu
    fi
}