cheat sheets for Linux,AIX,Solaries...............

http://www.scottklarr.com/topic/115/linux-unix-cheat-sheets---the-ultimate-collection/

AIX:
http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.doc/doc/base/commandsreference.htm