Ethernet setting disappear ubuntu 20.04

kiman

12/29/23, 7:36 AM

I'm using U20.04.

My ethernet setting suddenly disappear. I often share internet via USB from my phone but now it doesn't work. I don't know why, maybe I changed something in system. I tried some command(resolvectl flush-caches or changed some thing like what I found on internet) but I can't resolve.

When i type 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: enp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 00:1c:23:05:f3:6f brd ff:ff:ff:ff:ff:ff
3: wlp12s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:1b:77:c2:0c:c6 brd ff:ff:ff:ff:ff:ff
    inet 192.168.43.68/24 brd 192.168.43.255 scope global dynamic noprefixroute wlp12s0
       valid_lft 3195sec preferred_lft 3195sec
    inet6 fe80::3c84:452f:1118:9a99/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
7: usb0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether b6:fc:11:db:92:c9 brd ff:ff:ff:ff:ff:ff

Thanks.

0 + 0

networking

ethernet

20.04

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