大家好，
我遇到这个问题已经有一段时间了，但没有任何解决方案。我曾经在我的 Linux Kubuntu 18.04 上使用以太网连接，但从前段时间开始我就无法连接到它了。我搜索并尝试了多种在线解决方案，但都无济于事。以太网硬件没有问题，可以正常工作（我已经在其他电脑上测试过了）
以下是一些可能有助于发现问题的输出：
**sudo ifconfig**
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 4c:cc:6a:30:ad:db txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 209 bytes 34933 (34.9 KB)
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 1000 (Local Loopback)
RX packets 2192 bytes 218766 (218.7 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2192 bytes 218766 (218.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.77 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::af01:70b1:3e87:1345 prefixlen 64 scopeid 0x20<link>
inet6 2001:8a0:e3c5:1000:e8ec:e215:a11d:8b20 prefixlen 64 scopeid 0x0<global>
inet6 2001:8a0:e3c5:1000:16e2:613f:e17a:2207 prefixlen 64 scopeid 0x0<global>
ether 34:97:f6:63:13:c7 txqueuelen 1000 (Ethernet)
RX packets 77112 bytes 20588483 (20.5 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 162279 bytes 229023638 (229.0 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
**sudo nano /etc/resolv.conf**
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.
nameserver 127.0.0.53
options edns0
search Home
**sudo nano /etc/network/interfaces**
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
所有文件均保持原始安装状态。
谢谢大家的帮助。