网络 - 为什么linux的ip地址变成了127.0.0.1？

Answer 1

lo is the loopback network card, and 127.0.0.1 is the loopback address.

Answer 2

There may be a problem with the network configuration file.
Check the mac address of the eth0 network card

ifconfig eth0 

(The hexadecimal information after HWaddr is the mac address)

Then take a look at the corresponding configuration file, /etc/sysconfig/network-scripts/ifcfg-eth0

more /etc/sysconfig/network-scripts/ifcfg-eth0

If the mac address obtained in the first step is not consistent with the one in the configuration file, you can try to modify the configuration file.
Then, delete /etc/udev/rules.d/70-persistent-net.rules.
(For the function of /etc/udev/rules.d/70-persistent-net.rules, please refer to udev)

Restart the system and check whether eth0 is loaded normally.

The above is my centos method. I have not tried it on other Linux. If it does not work, please understand.

Answer 3

Agree with the above, add a new network card, and then start it again.