Last updated on August 11, 2024

Pre-Check

OS Version

## check OS/kernel version
root@baseline:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.04 LTS
Release:    24.04
Codename:   noble

root@baseline:~# uname -r
6.8.0-39-generic

Bind Static IP

## modify netplan configure file
root@baseline:~# vim /etc/netplan/50-cloud-init.yaml
root@baseline:~# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource.  Changes
# to it will not persist across an instance reboot.  To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        ens160:
            addresses:
            - 192.168.70.5/24
            routes:
              - to: default
                via: 192.168.70.2
            nameservers:
                addresses: [1.1.1.1, 8.8.8.8, 8.8.4.4]
                search: [hacking-linux.com]
    version: 2

## apply change
root@baseline:~# netplan apply

Evaluate

## evaluate if the IP already bind to server
root@baseline:~# netplan status
     Online state: online
    DNS Addresses: 127.0.0.53 (stub)
       DNS Search: hacking-linux.com

●  1: lo ethernet UNKNOWN/UP (unmanaged)
      MAC Address: 00:00:00:00:00:00
        Addresses: 127.0.0.1/8
                   ::1/128

●  2: ens160 ethernet UP (networkd: ens160)
      MAC Address: 00:0c:29:e6:65:a7 (Intel Corporation)
        Addresses: 192.168.70.5/24
                   fe80::20c:29ff:fee6:65a7/64 (link)
    DNS Addresses: 1.1.1.1
                   8.8.8.8
                   8.8.4.4
       DNS Search: hacking-linux.com
           Routes: default via 192.168.70.2 (static)
                   192.168.70.0/24 from 192.168.70.5 (link)
                   fe80::/64 metric 256
                   
root@baseline:~# ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:e6:65:a7 brd ff:ff:ff:ff:ff:ff
    altname enp2s0
    inet 192.168.70.5/24 brd 192.168.70.255 scope global ens160
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fee6:65a7/64 scope link
       valid_lft forever preferred_lft forever