Log in as root and run:
cd /u2/uv bin/uvregen -z
The serial number and other details will be printed to the console. For example:
[root@firestorm uv]# bin/uvregen -z UniVerse Ver.: 10.3.6 Serial#......: 12345678 Expiry Date..: 1/1/2500 Max Logins...: 60 Device Licn..: Disabled Conn per Dev.: 0 Authorized...: Yes UV master key: SYSTEM Package Name User Limit Expiry Date -UVNET 0 uv -GCI 60 1/1/2500 -UCI 60 1/1/2500 -UVCS 60 1/1/2500 -UVADM 60 1/1/2500 -UVODBC 60 1/1/2500 -iPHANTOM 60 1/1/2500 -CONNPL 0 uv