Want to find out how much memory is on your machine, how many processors it has, how fast they are, and that sort of thing?
There's a handy little utility that will tell you all this and more, but it's tucked away in an obscure directory - you might never stumble across it. It's called prtdiag. Run it like this:
/usr/platform/sun4u/sbin/prtdiag -v | more
Here's what the output looks like on my machine:
System Configuration: Sun Microsystems sun4u Sun Ultra 60 UPA/PCI (2 X UltraSPARC-II 296MHz)
System clock frequency: 99 MHz
Memory size: 1280 Megabytes
========================= CPUs =========================
Run Ecache CPU CPU
Brd CPU Module MHz MB Impl. Mask
--- --- ------- ----- ------ ------ ----
0 0 0 296 2.0 US-II 2.0
0 2 2 296 2.0 US-II 2.0
========================= IO Cards =========================
Bus Freq
Brd Type MHz Slot Name Model
--- ---- ---- ---------- ---------------------------- --------------------
0 PCI 33 On-Board network-SUNW,hme
0 PCI 33 On-Board scsi-glm/disk (block) Symbios,53C875
0 PCI 33 On-Board scsi-glm/disk (block) Symbios,53C875
0 UPA 99 29 FFB, Double Buffered SUNW,501-4788
0 UPA 99 30 FFB, Double Buffered SUNW,501-4788
No failures found in System
===========================
========================= HW Revisions =========================
ASIC Revisions:
---------------
PCI: pci Rev 4
PCI: pci Rev 4
Cheerio: ebus Rev 1
FFB Hardware Configuration:
-----------------------------------
Board rev: 2
FBC version: 0x3241906d
DAC: Brooktree 9070, version 1
3DRAM: Mitsubishi 130b, version 2
FFB Hardware Configuration:
-----------------------------------
Board rev: 2
FBC version: 0x3241906d
DAC: Brooktree 9070, version 1
3DRAM: Mitsubishi 130b, version 2
System PROM revisions:
----------------------
OBP 3.17.0 1998/10/23 11:26 POST 2.0.2 1998/10/19 10:46
So, there you go - as long as you can remember where to find the 'prtdiag' command, you can get a wealth of information about the configuration of your system.