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Private IP address https://linuxhandbook.com/find-ip-address/

hostname -I

nmcli -p device show

Public IP address https://www.tutorialspoint.com/find-my-public-ip-address-from-linux-command-line

Centos config file

dhcp

sudo more /etc/sysconfig/network-scripts/ifcfg-ens18

Code Block

title	dhcp

sudo vi /etc/sysconfig/network-scripts/ifcfg-ens18

BOOTPROTO=dhcp
DEFROUTE=yes
DEVICE=ens18
DHCPV6C=no
MTU=1500
NM_CONTROLLED=yes
ONBOOT=yes
PEERDNS=yes
TYPE=Ethernet
USERCTL=no

static

sudo more /etc/sysconfig/network-scripts/ifcfg-ens18

Code Block

title	static IP address

sudo vi /etc/sysconfig/network-scripts/ifcfg-ens18

Ubuntu Config file

renderer: networkd

renderer: NetworkManager

( not installed by default )

Raspberry + dual IP address debian

more /etc/network/interfaces

Code Block

title	network/interfaces

root@boxed:/var/www/html# more /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)

# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'

# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

auto eth0
iface eth0 inet dhcp

auto eth0:1
allow-hotplug eth0:1
iface eth0 inet static
      address 192.168.226.101
      netmask 255.255.255.0
      gateway 192.168.226.1
      dns-maneservers 8.8.8.8

networkd

netplan

vi /etc/netplan/xx--installer-config.yaml
!!! all the files in the list will be used

sudo netplan apply

sudo netplan get   ( get the config information )

Code Block

title	netplan config file YAML
collapse	true

more /etc/netplan/10-installer-config.yaml
# This is the network config written by 'subiquity'
network:
  version: 2
  renderer: networkd
  ethernets:
    ens33:
      dhcp4: true
    ens34:
      dhcp4: no
      addresses: [10.1.4.10/24]
      gateway4: 10.1.4.2

Network Manager

DHCP

/etc/network/interfaces

auto eth1
  iface eth1 inet dhcp

sudo systemctl restart networking

Static

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