system_info(query) -- print system specific information like OS, kernel,
	architecture etc.

def system_info(query):
	"""system_info(query) -- print system specific information like OS, kernel,
	architecture etc.
	"""
	proc = subprocess.Popen(["uname -o"], stdout=subprocess.PIPE, shell=True)
	(out, err) = proc.communicate()
	print "operating system : "+str(out),

	proc = subprocess.Popen(["uname"], stdout=subprocess.PIPE, shell=True)
	(out, err) = proc.communicate()
	print "kernel : "+str(out),

	proc = subprocess.Popen(["uname -r"], stdout=subprocess.PIPE, shell=True)
	(out, err) = proc.communicate()
	print "kernel release : "+str(out),

	proc = subprocess.Popen(["uname -m"], stdout=subprocess.PIPE, shell=True)
	(out, err) = proc.communicate()
	print "architecture : "+str(out),

	proc = subprocess.Popen(["uname -n"], stdout=subprocess.PIPE, shell=True)
	(out, err) = proc.communicate()
	print "network node name : "+str(out),