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[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."]]
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