add cheatsheet for df iwconfig ls and rm

cheatsheets/iwconfig

@@ -0,0 +1,8 @@
+# Display wireless settings of the first wireless adapter
+iwconfig wlan0
+
+# Take down / up the wireless adapter
+iwconfig wlan0 txpower {on|auto|off}
+
+# Change the mode of the wireless adapter
+iwconfig wlan0 mode {managed|ad-hoc|monitor}