CentOS get network information

 HowTo: Linux Show List Of Network Cards - nixCraft (cyberciti.biz)

# lspci | egrep -i --color 'network|ethernet'
# lspci | egrep -i --color 'network|ethernet|wireless|wi-fi'

# lshw -class network

# lshw -class network -short

# ethtool enp0s31f6

# ifconfig -a

# ip a

# hwinfo --network --short

cat /proc/net/dev