为什么我无法连接到互联网或 ping 我的默认网关？

2024-6-9 • tag-icon

我尝试过的：

我的计算机中有一个备用硬盘，我安装了 Linux Mint（20.2 cinnamon 64 位）。现在我可以启动到 Windows（我的主操作系统）或 Mint。全新安装后，我可以轻松连接到互联网，我可以完美地下载并安装系统更新。配置完设置后，我在 Windows 上玩了一段时间游戏。当我重新启动 Mint 时，我无法访问互联网。我尝试过通过Google的传统方式解决这个问题，但没有成功。我什至尝试从全新安装时创建的快照进行恢复。但我尝试过的任何方法都无法让我上网。

当前配置和有用的（希望）输出：

$> arp -a
_gateway (192.168.0.1) at <incomplete> on eno1

$> cat /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 "resolvectl 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 trust-ad

$> cat /etc/network/interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
auto lo
iface lo inet loopback

auto eno1
iface eno1 inet static
    address 192.168.0.22
    netmask 255.255.255.0
    network 192.168.0.0
    broadcast 192.168.0.255
    #post-up iptables-restore < /etc/iptables.up.rules
    gateway 192.168.0.1
    dns-nameservers 192.168.0.22 8.8.8.8

$> ip addr

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: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether e0:3f:49:eb:23:b3 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.22/24 brd 192.168.0.255 scope global eno1
       valid_lft forever preferred_lft forever
    inet6 2601:845:c100:940:4053:8cea:72a7:901c/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 345591sec preferred_lft 345591sec
    inet6 fe80::c826:b952:2608:8ee2/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

$> cat /etc/NetworkManager/NetworkManager.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=true

[device]
wifi.scan-rand-mac-address=no

$> cat /etc/NetworkManager/NetworkManagerconf.d/10-globally-managed-devices

[keyfile]
unmanaged-devices=none

$> nmcli d

DEVICE  TYPE      STATE      CONNECTION      
eno1    ethernet  connected  Ifupdown (eno1) 
lo      loopback  unmanaged  --

$> cat /etc/nsswitch.conf

# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         files systemd
group:          files systemd
shadow:         files
gshadow:        files

hosts:          files mdns4_minimal [NOTFOUND=return] dns myhostname
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

$> ping -c 10 8.8.8.8

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.0.22 icmp_seq=1 Destination Host Unreachable
From 192.168.0.22 icmp_seq=2 Destination Host Unreachable
From 192.168.0.22 icmp_seq=3 Destination Host Unreachable
From 192.168.0.22 icmp_seq=4 Destination Host Unreachable
From 192.168.0.22 icmp_seq=5 Destination Host Unreachable
From 192.168.0.22 icmp_seq=6 Destination Host Unreachable
From 192.168.0.22 icmp_seq=7 Destination Host Unreachable
From 192.168.0.22 icmp_seq=8 Destination Host Unreachable
From 192.168.0.22 icmp_seq=9 Destination Host Unreachable
From 192.168.0.22 icmp_seq=10 Destination Host Unreachable

--- 8.8.8.8 ping statistics ---
10 packets transmitted, 0 received, +10 errors, 100% packet loss, time 9207ms
pipe 3

$> ping -c 10 192.168.0.1

PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
From 192.168.0.22 icmp_seq=1 Destination Host Unreachable
From 192.168.0.22 icmp_seq=2 Destination Host Unreachable
From 192.168.0.22 icmp_seq=3 Destination Host Unreachable
From 192.168.0.22 icmp_seq=4 Destination Host Unreachable
From 192.168.0.22 icmp_seq=5 Destination Host Unreachable
From 192.168.0.22 icmp_seq=8 Destination Host Unreachable
From 192.168.0.22 icmp_seq=9 Destination Host Unreachable
From 192.168.0.22 icmp_seq=10 Destination Host Unreachable

--- 192.168.0.1 ping statistics ---
10 packets transmitted, 0 received, +8 errors, 100% packet loss, time 9211ms
pipe 4

$> route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eno1
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 eno1
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eno1

答案1

答案竟然是……

启动进入 BIOS
将 Linux Mint 的 HDD 设置为最高启动优先级
关闭计算机电源
直接启动进入Linux
快乐的配置

（我猜想 Windows 驱动程序不会完全放弃对硬件的控制，直到重新启动电源为止，因此重新启动 Linux 不起作用。）

感谢@Murray Jensen 的评论（：

答案1

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