post_install() {
	getent group ntp &>/dev/null || groupadd -g 87 ntp >/dev/null
	getent passwd ntp &>/dev/null || useradd -u 87 -g ntp -d /var/lib/ntp -c 'Network Time Protocol' -s /bin/false ntp >/dev/null
	true
}

post_remove() {
	getent passwd ntp &>/dev/null && userdel ntp >/dev/null
	getent group ntp &>/dev/null && groupdel ntp >/dev/null
	true
}
