Debian: Set Static IP

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1. Backup the original interfaces file to desired backup location.
   • cp /etc/network/interfaces /usr/bu
2. Modify the original file, configuring:
   • iface <interface> inet static
   • address <desired static ip>
   • netmask <netmask>
   • gateway <gateway>
   • dns-nameservers <nameserver ip> <nameserver ip>
3. Save the file and restart the networking service.
   • systemctl restart networking.service
4. Confirm the IP address with ip a.
5. The interfaces file should resemble the below.

 # This file describes the network interfaces available on your system
 # and how to activate them. For more information, see interfaces(5).
 
 source /etc/network/interfaces.d/*
 
 # The loopback network interface
 auto lo
 iface lo inet loopback
 
 # The primary network interface
 # allow-hotplug ens192
 # iface ens192 inet dhcp
 
 auto ens192
 iface ens192 inet static
   address 10.168.123.234
   netmask 255.255.0.0
   gateway 10.168.11.300
   dns-nameservers 1.0.0.1 1.0.0.3