New school Ubuntu Internet access settings Guide

I don't know what operations I have done, so Ubuntu cannot access the Internet. Alas, it's so annoying! I checked it for a long time and did not know what was going on. After hitting it by mistake, I finally configured it. The steps are as follows:

I don't know what operations I have done, so Ubuntu cannot access the Internet. Alas, it's so annoying!

I checked it for a long time and did not know what was going on. I finally configured it by mistake. The steps are as follows:

Sudo ifconfig eth1 down

Sudo ifconfig eth1 192.168.0.105 broadcast 192.168.0.255 netmask 255.255.255.0
Sudo ifconfig eth1 up

Ifconfg eth1

The result is:

Eth1 Link encap: Ethernet hardware address 00: 0c: 29: cf: 54: 46
Inet address: 192.168.0.105 broadcast: 192.168.0.255 mask: 255.255.255.0
Inet6 address: fe80: 20c: 29ff: fecf: 5446/64 Scope: Link
Up broadcast running multicast mtu: 1500 hops: 1
Received data packet: 3671 error: 0 discard: 0 overload: 0 frames: 0
Send data packets: 1709 error: 0 discard: 0 overload: 0 carrier: 0
Collision: 0 sending queue length: 1000
Received byte: 380672 (371.7 KB) sent byte: 185600 (181.2 KB)
Interrupt: 16 base address: 0x1424

You can access the Intranet, but you still cannot access the Intranet:

Route
The result is: The target gateway subnet mask indicates the interface used by the vertex reference.
192.168.0.0*255.255.255.0 U 0 0 0 eth1

If the gateway is not correct, set it:

Sudo route add default gw 192.168.0.1

After these settings, you can finally access the internet! Sign!