I have a clean installation of Ubuntu 12.04 Server. I would like to find the UUID for a network connection. How do I find this?

ifconfig -a does not list it:

eth0      Link encap:Ethernet  HWaddr 00:1e:67:6a:78:a8  

          inet addr:192.168.50.18  Bcast:192.168.50.255  Mask:255.255.255.0

          inet6 addr: fe80::21e:67ff:fe6a:78a8/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:572287 errors:0 dropped:0 overruns:0 frame:0

          TX packets:70324 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:222908307 (222.9 MB)  TX bytes:7982096 (7.9 MB)

          Interrupt:16 Memory:c2300000-c2320000 

nmcli is not installed (because this is Ubuntu server):

user@server# nmcli

The program 'nmcli' is currently not installed.  You can install it by typing:

apt-get install network-manager

From a desktop install, I can do:

user@desktop# nmcli c list

NAME                      UUID                                   TYPE              TIMESTAMP-REAL                    

Wired connection 2        d00a6778-80d6-4812-ad54-041de24e47fe   802-3-ethernet    Mon 16 Dec 2013 12:20:09 EST      

Wired connection 1        4fb95570-1922-495a-b498-846b7a6b0655   802-3-ethernet    Tue 17 Dec 2013 11:20:03 EST      

miwifi                    f3182ff5-81c2-44c4-9c4b-d3a1f0a550e9   802-11-wireless   never   

How do I find it when network-manager isn't installed? Surely I don't have to install network-manager?