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
它说未知接口 enp0s3
网络很好,没有任何问题。只是命令不起作用。
Ubuntu 16.04(Xenial)
以下是输出ip a s
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: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> 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
以下是我的 /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
nmcli conn sh 的输出
Wired connection 1 42d740b1-21c3-3b7c-8b9e-5922fe8a6380 802-3-ethernet enp0s3
答案1
ifup
和ifdown
用于设置在 中列出的接口/etc/network/interfaces
。enp0s3
此文件中未描述,因此绝对可以预料到ifup
和 ifdown 不知道如何处理它。添加一些行,例如
iface enp0s3 inet dhcp
您会发现它的效果会更好。
答案2
我使用了以下命令:
cat /proc/net/dev
ls /sys/class/net
ip link show
ifconfig
sudo ifconfig [interface-name] down / up