当我使用带有 4g USB 调制解调器的 raspbian 时,有时网络会出现故障,除非重新启动 raspbian,否则无法恢复网络。
在这种情况下,我尝试:
service networking restart
每小时执行一次 cron;这是行不通的。
我也尝试过ifdown -a && ifup -a
——也好不了多少。
问题是,当我在终端中执行这些命令时,没有任何输出。
有什么办法可以让我重新启动网络?
root@raspberrypi:/home/pi# ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.100 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::48f5:e07c:1544:2d24 prefixlen 64 scopeid 0x20<link>
ether b8:27:eb:38:6e:29 txqueuelen 1000 (Ethernet)
RX packets 23902 bytes 8949877 (8.5 MiB)
RX errors 0 dropped 17 overruns 0 frame 0
TX packets 30039 bytes 6388288 (6.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Boucle locale)
RX packets 20996 bytes 8495857 (8.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 20996 bytes 8495857 (8.1 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether b8:27:eb:6d:3b:7c txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
答案1
我发现在 Raspbian 上唯一有效的是:
sudo ifconfig wlan0 down && sleep 5 && sudo ifconfig wlan0 up