In this tutorial I show how to activate network card (NIC) using terminal.
Commands:
1. ip link show
2. cd /etc/sysconfig/network-scripts/
OR
cd /etc/network/
3. nano "YOUR NIC"
e.g. : nano ifcfg-enp4s0
OR
nano interfaces
4. If missing add "HWADDR"
5. If need replace old mac address with new mac address
6. Save
7. Reboot
VOILA :)
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