deban 中的網路介面：wifi 和 usb-ethernet

剛剛在 iMac5,1 上安裝了 Debian。

X11 根本不起作用，所以這一切都在命令行上。

我將內置乙太網連接到我的家庭寬頻集線器。都好。

我想讓wifi正常工作。

# lspci
...
03:00.0 Network controller: Broadcom Limited BCM4321 802.11a/b/g/n (rev 01)
...
# apt-get install firmware-b43-installer
# apt-get install iw
# apt-get install wireless-tools

# apt-get install connman
# connmanctl
connmanctl> enable wifi
Error wifi: Method "SetProperty" with signature "sv" on interface "net.connman.Technology" doesn't exist

connmanctl>

怎麼辦？！如何判斷驅動程序是否確實已安裝並正常工作？

第二：我有一個 USB 乙太網適配器——最終我會想要橋接網路。

# lsusb
...
Bus 001 Device 002: ID 0b95:772a ASIX Electronics Corp. AX88772A Fast Ethernet
...

再次：現在呢？

而這第三個介面：是wifi還是USB？

# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
   inet6 ::1/128 scope host
      valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 00:16:cb:9c:eb:ce brd ff:ff:ff:ff:ff:ff
   inet 192.168.1.51/24 brd 192.168.1.255 scope global enp2s0
      valid_lft forever preferred_lft forever
   inet 192.168.2.14/24 brd 192.168.2.255 scope global enp2s0
      valid_lft forever preferred_lft forever
   inet6 fe80::216:cbff:fe9c:ebce/64 scope link
      valid_lft forever preferred_lft forever
3: enx00808e8c92f8: <NO-CARRIER,BROADCAST,MULTICAST,DYNAMIC,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
   link/ether 00:80:8e:8c:92:f8 brd ff:ff:ff:ff:ff:ff

（我希望機器具有靜態地址 192.168.1.51 並進行/etc/network/interfaces相應設置，但它似乎忽略了這一點並從路由器獲取另一個地址。）

更新：出現 wlan0 並且介面被忽略

root@imac51:~# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#allow-hotplug enp2s0
auto enp2s0
iface enp2s0 inet static
       address 192.168.1.51
       netmask 255.255.255.0
       gateway 192.168.1.1
root@imac51:~#
root@imac51:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
   inet6 ::1/128 scope host
      valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 00:16:cb:9c:eb:ce brd ff:ff:ff:ff:ff:ff
   inet 192.168.2.14/24 brd 192.168.2.255 scope global enp2s0
      valid_lft forever preferred_lft forever
   inet6 fe80::216:cbff:fe9c:ebce/64 scope link
      valid_lft forever preferred_lft forever
3: enx00808e8c92f8: <NO-CARRIER,BROADCAST,MULTICAST,DYNAMIC,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
   link/ether 00:80:8e:8c:92:f8 brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
   link/ether 00:17:f2:99:7b:9b brd ff:ff:ff:ff:ff:ff
root@imac51:~#

重新啟動似乎已經wlan0出現並且connmann正在做某事。關閉再打開的情況…

擺弄了一下connmanctrl，現在它似乎已經連接了——在另一次重新啟動之後。是否可以更改路由器上顯示的電腦名稱？

看來這connman對 DHCP 有作用。無論如何都沒有必要，所以最好不要使用它。使用iw(command for do things with wifi) 和wpasupplicant(add wpa-commands to /etc/network/interfaces) 和 this 在/etc/network/interfaces：

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
       wpa-ssid RWB
       wpa-psk password

請注意，對於這台機器，WiFi 硬體是 Broadcom 4321，正確的封裝是firmware-bc43-installer；安裝程序猜到另一個錯誤的包，結果是它將加入 AP 但無法訪問網路。這會影響 Ubuntu 20 和 Mint 10 安裝程序。

引用自：https://unix.stackexchange.com/questions/613148