uname 					->	"Linux", "Darwin", "FreeBSD", "NetBSD", "SunOS"
uname -s /*OS name*/	->	dito
uname -r /*release*/	->	"2.4.20-8", "1.6.1", "2.4.19-SMP"
uname -v /*version*/	->	"#1 Thu Mar 13 17:54:28 EST 2003"
uname -m /*machine*/	->	"i686", "i386", "x86_64"
uname -p /*processor*/	->	"i686", "i386", "unknown"

/proc/version			->	Linux version 2.4.20-8 (bhcompile@porky.devel.redhat.com) \
							(gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) \
							#1 Thu Mar 13 17:54:28 EST 2003

cc -dumpversion			->	"2.95.2", "3.2.2"

/bin/arch				->	i686
/usr/bin/arch -k
/usr/convex/getsysinfo
hostinfo
/bin/machine
/usr/bin/oslevel
/bin/universe

/etc/redhat-release		->	"Red Hat Linux release 9 (Shrike)"
							"Red Hat Linux release 8 (Psyche)"

Solaris:
/usr/include/sys/isa_defs.h	-> lots of defines! (exactly what i try to do!)