라즈베리파이에 USB 무선랜을 끼우고 와이파이를 잡아봤습니다.
OS는 CentOS Linux release 7.6.1810 (AltArch) ARM 버전용이 설치되어 있습니다.
[root@localhost ~]# nmcli d
DEVICE TYPE STATE CONNECTION
eth0 ethernet connected Wired connection 1
wlan0 wifi disconnected --
lo loopback unmanaged -- [root@localhost ~]# nmcli d wifi list
IN-USE SSID MODE CHAN RATE SIGNAL BARS iptime-2.4 Infra 7 270 Mbit/s 100 ▂▄▆█ SK_WiFiGIGAA254 Infra 4 130 Mbit/s 84 ▂▄▆█ -- Infra 1 130 Mbit/s 70 ▂▄▆_ U+NetF634 Infra 1 130 Mbit/s 64 ▂▄▆_ HelloWireless731D Infra 11 130 Mbit/s 27 ▂___ [root@localhost ~]# nmcli d wifi connect SSID password 비밀번호
Device 'wlan0' successfully activated with '2f438da0-4131-7bc5-937a-8e3f614692e3'.
[root@localhost ~]# nmcli d
DEVICE TYPE STATE CONNECTION
eth0 ethernet connected Wired connection 1
wlan0 wifi connected iptime-2.4
lo loopback unmanaged -- [root@localhost ~]# ifconfig
...
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.100.111 netmask 255.255.255.0 broadcast 192.168.100.255 inet6 fe80::3d35:2457:16f3:437b prefixlen 64 scopeid 0x20<link> ether 00:08:4f:f4:be:a1 txqueuelen 1000 (Ethernet) RX packets 59 bytes 12099 (11.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 16 bytes 2164 (2.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
위의 과정을 보시고 자신의 환경에 맞게 설정하시면 됩니다.
[root@localhost ~]# nmcli d
DEVICE TYPE STATE CONNECTION
wlan0 wifi connected iptime-2.4
eth0 ethernet unavailable --
lo loopback unmanaged --
유선랜을 빼고 무선랜만 남겨둔 상태에서 재부팅해도 인터넷이 잘 되는군요~
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