0: device type
1: serial
if [ -r /var/lib/dbus/machine-id ] ; then cat /var/lib/dbus/machine-id; elif [ -r /var/lib/dbus/machine-id ] ; then cat /var/lib/dbus/machine-id; elif [ -r /var/db/dbus/machine-id ] ; then cat /var/db/dbus/machine-id; fi
2: mac
cat /sys/class/net/*/address | sort -n | grep -v "^[0:]*$"
3: disk
disk=$(df | grep "/$" | sed "s/^[^ ]*\/\([^ ]*\).*/\1/") && find /dev/disk/by-uuid -type l -exec sh -c "readlink {} | grep -o $disk >/dev/null && basename {}" \;
4: additional (hostname)
cat /etc/hostname
cat /proc/cpuinfo | grep -i "^model name" | head -1 | sed "s/[^:]*:[ ]*//"