Managing Ubuntu Server 20.04

• Disabling IPv6 address on Ubuntu 20.04 LTS Focal Fossa step by step instructions
• Removing cloud-init from Ubuntu 20.04

Disabling IPv6 address on Ubuntu 20.04 LTS Focal Fossa step by step instructions

Objective: To disable ipv6 where it is persistent among reboots

In case you need more permanent solution to disable IPv6 even after system reboot follow the steps below:

STEP 1:

As an administrative user open up the /etc/default/grub file using your favorite text editor and make to following changes:

FROM:
GRUB_CMDLINE_LINUX_DEFAULT=""
TO:
GRUB_CMDLINE_LINUX_DEFAULT="ipv6.disable=1"

---

---

STEP 2:

Once ready update Grub menu:

$ sudo update-grub

In case you need to re-enable the IPv6 network addresses simply remove the ipv6.disable=1 from the /etc/default/grub file and run the update-grub command.

Removing cloud-init from Ubuntu 20.04

Objective: To disable or remove cloud-init from your ubuntu 20.04 Server

Method 1: Disable cloud-init from file

This is the safest and the easiest method. We only need to create cloud-init.disabled file in /etc/cloud directory and reboot the system.

• To create empty file, issue this comand:

sudo touch /etc/cloud/cloud-init.disabled

• and reboot:

init 6

Method 2: Remove cloud-init package and folder

This last method is not disabling cloud-init but completely removing cloud-init package from your Ubuntu Server machine.

• Remove cloud-init package completely

sudo apt purge cloud-init -y

• Remove /etc/cloud folder

sudo rm -rf /etc/cloud && sudo rm -rf /var/lib/cloud/

• Reboot the system

init 6

 

You will see that boot time has dramatically decreased.