macchanger: add page (#4087)

Co-authored-by: Zlatan Vasović <zlatanvasovic@gmail.com>

pages/linux/macchanger.md

@@ -0,0 +1,19 @@
+# macchanger
+
+> Command-line utility for manipulating network interface MAC addresses.
+
+- View the current and permanent MAC addresses of a interface:
+
+`macchanger --show {{interface}}`
+
+- Set interface to a random MAC:
+
+`macchanger --random {{interface}}`
+
+- Set interface to a specific MAC:
+
+`macchanger --mac {{XX:XX:XX:XX:XX:XX}} {{interface}}`
+
+- Reset interface to its permanent hardware MAC:
+
+`macchanger --permanent {{interface}}`