这是ifconfig的输出

# ifconfig

enp0s3 Link encap:Ethernet HWaddr 08:00:27:ef:b6:e6

inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0

inet6 addr: fe80::cf19:776a:4d5c:36e0/64 Scope:Link

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:713069 errors:0 dropped:0 overruns:0 frame:0

TX packets:6767 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:45869812 (45.8 MB) TX bytes:667164 (667.1 KB)

lo Link encap:Local Loopback

inet addr:127.0.0.1 Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING MTU:65536 Metric:1

RX packets:1108 errors:0 dropped:0 overruns:0 frame:0

TX packets:1108 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:86846 (86.8 KB) TX bytes:86846 (86.8 KB)

当我做

# ifdown enp0s3

它说Unknown interface enp0s3

网络很好,工作没有任何问题.

它只是不起作用的命令

Ubuntu 16.04(Xenial)

以下是ip a s的输出

1: lo: 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: enp0s3: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 08:00:27:ef:b6:e6 brd ff:ff:ff:ff:ff:ff

inet 192.168.2.7/24 brd 192.168.2.255 scope global enp0s3

valid_lft forever preferred_lft forever

inet6 fe80::cf19:776a:4d5c:36e0/64 scope link

valid_lft forever preferred_lft forever

下面是我的/ etc / network / interfaces

# interfaces(5) file used by ifup(8) and ifdown(8)

auto lo

iface lo inet loopback

输出nmcli conn sh

Wired connection 1 42d740b1-21c3-3b7c-8b9e-5922fe8a6380 802-3-ethernet enp0s3

ifup和ifdown用于设置/ etc / network / interfaces中列出的接口. enp0s3没有在这个文件中描述,所以绝对希望ifup和ifdown不知道如何处理它.添加一些如

iface enp0s3 inet dhcp

你会发现它会更好地运作.