[Para [Str "Next,",Space,Str "open",Space,Str "the",Space,Str "terminal",Space,Str "window.",Space,Str "Using",Space,Str "the",Space,Str "terminal",Space,Str "window,",Space,Str "run",Space,Str "the",Space,Str "\"ifconfig",Space,Str "-a\"",Space,Str "command",Space,Str "to",Space,Str "list",Space,Str "all",Space,Str "the",Space,Str "interfaces",Space,Str "on",Space,Str "your",Space,Str "system,",Space,Str "as",Space,Str "shown",Space,Str "here."]
,CodeBlock ("",[],[]) "# ifconfig -a\neth0      Link encap:Ethernet  HWaddr 00:0c:29:69:12:7c  \n          inet addr:172.16.0.108  Bcast:172.16.0.255  Mask:255.255.255.0\n          inet6 addr: fc00:660:0:1:20c:29ff:fe69:127c/64 Scope:Global\n          inet6 addr: fe80::20c:29ff:fe69:127c/64 Scope:Link\n          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1\n          RX packets:9859 errors:0 dropped:0 overruns:0 frame:0\n          TX packets:1399 errors:0 dropped:0 overruns:0 carrier:0\n          collisions:0 txqueuelen:1000 \n          RX bytes:1920894 (1.8 MiB)  TX bytes:233088 (227.6 KiB)\n          Interrupt:19 Base address:0x2000 \n\nlo        Link encap:Local Loopback  \n          inet addr:127.0.0.1  Mask:255.0.0.0\n          inet6 addr: ::1/128 Scope:Host\n          UP LOOPBACK RUNNING  MTU:65536  Metric:1\n          RX packets:372 errors:0 dropped:0 overruns:0 frame:0\n          TX packets:372 errors:0 dropped:0 overruns:0 carrier:0\n          collisions:0 txqueuelen:0 \n          RX bytes:22320 (21.7 KiB)  TX bytes:22320 (21.7 KiB)\n\nwlan0     Link encap:Ethernet  HWaddr 00:c0:ca:85:00:ba  \n          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1\n          RX packets:0 errors:0 dropped:0 overruns:0 frame:0\n          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0\n          collisions:0 txqueuelen:1000 \n          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)"
,Para [Str "The",Space,Str "ALFA",Space,Str "wireless",Space,Str "card",Space,Str "is",Space,Str "represented",Space,Str "by",Space,Str "the",Space,Str "\"wlan0\"",Space,Str "interface."]
,Para [Str "In",Space,Str "addition",Space,Str "to",Space,Str "the",Space,Str "interfaces",Space,Str "shown",Space,Str "in",Space,Str "the",Space,Str "ifconfig",Space,Str "output,",Space,Str "there",Space,Str "is",Space,Str "another",Space,Str "interface",Space,Str "known",Space,Str "as",Space,Str "the",Space,Emph [Str "wireless",Space,Str "physical",Space,Str "interface"],Str ".",Space,Str "We",Space,Str "can",Space,Str "identify",Space,Str "this",Space,Str "interface",Space,Str "by",Space,Str "listing",Space,Str "the",Space,Str "contents",Space,Str "of",Space,Str "the",Space,Str "/sys/class/ieee80211",Space,Str "directory,",Space,Str "as",Space,Str "shown."]
,CodeBlock ("",[],[]) "# ls /sys/class/ieee80211/\nphy0"
,Para [Str "The",Space,Str "\"phy0\"",Space,Str "interface",Space,Str "is",Space,Str "the",Space,Str "parent",Space,Str "interface",Space,Str "used",Space,Str "to",Space,Str "create",Space,Str "child",Space,Str "interfaces.",Space,Str "Note",Space,Str "that",Space,Str "if",Space,Str "you",Space,Str "unplug",Space,Str "and",Space,Str "replug",Space,Str "the",Space,Str "USB",Space,Str "interface,",Space,Str "the",Space,Str "\"phy\"",Space,Str "interface",Space,Str "number",Space,Str "will",Space,Str "increment",Space,Str "by",Space,Str "one",Space,Str "until",Space,Str "you",Space,Str "reboot",Space,Str "your",Space,Str "system."]]
