update-initramfs command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

update-initramfs: command not found

or when using sudo you get the following error message

sudo: update-initramfs: command not found

Solutions to update-initramfs: command not found

How To Fix update-initramfs: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu update-initramfs is provided by initramfs-tools package.

initramfs-tools is:

This package builds a bootable initramfs for Linux kernel packages. The initramfs is loaded along with the kernel and is responsible for mounting the root filesystem and starting the main init system.

To fix this problem, we can install more using the command below.

sudo apt-get -y install initramfs-tools

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install initramfs-tools.

sudo apt -y install initramfs-tools

Or if you have aptitude installed you can use the following command.

sudo aptitude install initramfs-tools

Summary

In this tutorial we learn how to fix update-initramfs command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.