unmkinitramfs command not found

Introduction

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

unmkinitramfs: command not found

or when using sudo you get the following error message

sudo: unmkinitramfs: command not found

Solutions to unmkinitramfs: command not found

How To Fix unmkinitramfs: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu unmkinitramfs is provided by initramfs-tools-core package.

initramfs-tools-core is:

This package contains the mkinitramfs program that can be used to create a bootable initramfs for a Linux kernel. The initramfs should be loaded along with the kernel and is then 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-core

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

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

sudo apt -y install initramfs-tools-core

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

sudo aptitude install initramfs-tools-core

Summary

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