centos cannot recognize new network card after adding it

Solution:

1. Get the real mac of the new network card

#ip addr

2. Copy eth0 to eth1 and modify the configuration file

#cd /etc/sysconfig/network-scripts
#cp ifcfg-eth0 ifcfg-eth1
#vim ifcfg-eth1

3. Modify the following content:

HWADD    通过ip addr获取
UUID     若没有查到UUID，可以注释掉
NAME     改为当前的网卡名eth1
DEVICE     改为当前的网卡名eth1
IPADDR
GATEWAY

Save and exit.

4. Restart the network card

#systemctl restart network

Recommended related tutorials: centos tutorial

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