Page Comparison

ip link	Link
show the interface	ip link show ip link show ens33
bring the interface up	ip link set dev ens33 up

ip addr	Link
	ip addr ip addr show ens33
Centos	ip addr add 192.168.1.1/24 dev eth0

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

curl ifconfig.me

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 IP address network-scripts ifcfg-ens ifcfg-eth

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

Code Block

title	static IP address

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

systemctl restart network.service

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 ( ubuntu on AWS )

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

bond or lag

Code Block

title	bond

. . . 
  bonds:
    bond0:
      addresses:
        - 10.0.0.1/24
      interfaces:
        - eno1
        - eno2
      parameters:
        mode: 802.3ad
        lacp-rate: slow
        transmit-hash-policy: layer3+4
        mii-monitor-interval: 1

vlan

Code Block

title	vlan

  . . .
  vlans:
    bond0.100:
      id: 100
      link: bond0
      addresses:
        - 10.100.0.1/24

netplan apply

Network Manager

DHCP

/etc/network/interfaces

auto eth1
  iface eth1 inet dhcp

sudo systemctl restart networking

Static

Code Block

title	network interface

# The primary network interface
iface eth0 inet manual
auto pnet0
iface pnet0 inet static
    pre-up ip link set dev eth0 up
    address 192.168.0.115
    network 192.168.0.0
    netmask 255.255.255.0
    gateway 192.168.0.1
    dns-nameserver 8.8.8.8
    dns-search  example.com
    bridge_ports eth0
    bridge_stp off

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