AIX commands you should not leave home without

Here are some of the commands

How many processors does my system have?
To display the number of processors on your system, type:

$ lscfg | grep proc
+ proc0 Processor
+ proc2 Processor
+ proc4 Processor
+ proc6 Processor
+ proc8 Processor
+ proc10 Processor
+ proc12 Processor
+ proc14 Processor

How much real memory does my machine have?
To display real memory in kilobytes (KB), type one of the following:
$ lsattr -El sys0 -a realmem
realmem 10485760 Amount of usable physical memory in Kbytes False