====== Linux IP Command ======
[[https://www.cyberciti.biz/faq/linux-ip-command-examples-usage-syntax/|here]]

===== Show Subnet Data =====
<code>sudo apt install sipcalc</code>
<code>sipcalc 192.168.1.0/24 -a</code>
===== Show Network Data =====

Use [[https://www.tecmint.com/configure-network-connections-using-nmcli-tool-in-linux/|nmcli]] <code>nmcli device show</code>
or
<code>#!/bin/bash

INTERFACE=ens34

echo "         Interface: $INTERFACE"
ip -4 addr show $INTERFACE | grep inet | awk -F " " '{print "              IPv4: " $2}'
ip route | grep default | grep "metric 100" | awk -F " " '{print "           Gateway: " $3}'
resolvectl -i $INTERFACE status --no-pager | awk '/DNS Server/,0'
nmcli connection show Wired\ connection\ 1 | grep -i dhcp_server_identifier | awk -F " " '{print "       DHCP Server: " $4}'</code>

Get DHCP Server
<code>nmcli connection show --active
nmcli connection show "<active-connection-name>" | grep -i dhcp_server_identifier</code>
====== Ubuntu 20.04 Static IP ======
set the following in ''/etc/netplan/50-static-ip''
<code>network:
    version: 2
    ethernets:
        ens160:
            dhcp4: false
            addresses:
            - 192.168.1.2/24
            - 2001:db8:aaaa:bbbb:cccc::10/64
            gateway4: 192.168.1.1
            gateway6: 2001:db8:aaaa:bbbb:cccc::1/64
            nameservers:
              addresses:
              - 2001:db8:aaaa:bbbb:cccc::1/64
              - 192.168.1.1
              search: [internal.domain]</code>
Then run
<code>sudo netplan apply</code>