版本環境
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組件	版本
xfce	4.14.0
ubuntu	19.10

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apt-get install wpasupplicant wireless-tools?

ifconfig得到:

enp4s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500ether 60:a4:4c:6d:ce:0a txqueuelen 1000 (Ethernet)RX packets 71149 bytes 81430076 (81.4 MB)RX errors 96 dropped 0 overruns 0 frame 0TX packets 65350 bytes 9452283 (9.4 MB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0device interrupt 19 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536inet 127.0.0.1 netmask 255.0.0.0inet6 ::1 prefixlen 128 scopeid 0x10<host>loop txqueuelen 1000 (Local Loopback)RX packets 7076 bytes 595524 (595.5 KB)RX errors 0 dropped 0 overruns 0 frame 0TX packets 7076 bytes 595524 (595.5 KB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500inet 192.168.1.11 netmask 255.255.255.0 broadcast 192.168.1.255inet6 240e:388:1c1a:8300:39d0:8ebf:5d86:bb79 prefixlen 64 scopeid 0x0<global>inet6 240e:388:1c1a:8300:c85f:66a:7203:6a7 prefixlen 64 scopeid 0x0<global>inet6 fe80::3ab5:a0:45b7:f0ed prefixlen 64 scopeid 0x20<link>ether 6c:71:d9:1f:f0:4b txqueuelen 1000 (Ethernet)RX packets 2894 bytes 1554450 (1.5 MB)RX errors 0 dropped 0 overruns 0 frame 0TX packets 3320 bytes 804126 (804.1 KB)TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

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根據上面的結果，發現無線網的名字是:

wlp3s0(每臺電腦都可能是不一樣的結果)

我們嘗試啟動無線網絡

ifconfig wlp3s0 up

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Xfce Panel需要的是Notification Area才會顯示無線網絡，就是下面這個東西，

如果你不在panel中增加這個，會導致即使有wifi也顯示不了

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然后就可以連上wifi網了。

當然如果你的無線網卡比較特殊的話，那么就可能需要事先安裝驅動才行。

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Reference:

[1]https://unix.stackexchange.com/questions/66577/network-manager-doesnt-show-wireless-connection

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總結

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