How To Install shim on Ubuntu 20.04
Introduction
In this tutorial we learn how to install shim on Ubuntu 20.04.
What is shim
shim is:
This package provides a minimalist boot loader which allows verifying signatures of other UEFI binaries against either the Secure Boot DB/DBX or against a built-in signature database. Its purpose is to allow a small, infrequently-changing binary to be signed by the UEFI CA, while allowing an OS distributor to revision their main bootloader independently of the CA. Task: ubuntu-core Phased-Update-Percentage: 37
Package: shim Status: install ok installed Priority: optional Section: admin Installed-Size: 3771 Maintainer: Ubuntu Developers [email protected] Architecture: amd64 Version: 15+1552672080.a4a1fbe-0ubuntu2 Breaks: shim-signed (« 1.33~) Description-en: boot loader to chain-load signed boot loaders under Secure Boot This package provides a minimalist boot loader which allows verifying signatures of other UEFI binaries against either the Secure Boot DB/DBX or against a built-in signature database. Its purpose is to allow a small, infrequently-changing binary to be signed by the UEFI CA, while allowing an OS distributor to revision their main bootloader independently of the CA. Original-Maintainer: Steve Langasek [email protected]
Package: shim Architecture: amd64 Version: 15+1533136590.3beb971-0ubuntu1 Priority: optional Section: admin Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: Steve Langasek [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 3744 Breaks: shim-signed (« 1.33~) Filename: pool/main/s/shim/shim_15+1533136590.3beb971-0ubuntu1_amd64.deb Size: 574704 MD5sum: 57145d15f6745f2dd9a081cf39da0350 SHA1: cb39bc7bddf189ab15baaf7a087169a886dc30bc SHA256: 3099b90ba9d7bdf705a89a936b622633fe2a5141f24aa0af046b6c629d5475c5 Description-en: boot loader to chain-load signed boot loaders under Secure Boot This package provides a minimalist boot loader which allows verifying signatures of other UEFI binaries against either the Secure Boot DB/DBX or against a built-in signature database. Its purpose is to allow a small, infrequently-changing binary to be signed by the UEFI CA, while allowing an OS distributor to revision their main bootloader independently of the CA. Task: ubuntu-core
There are three methods to install shim on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install shim Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install shim using apt-get by running the following command:
sudo apt-get -y install shim
Install shim Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install shim using apt by running the following command:
sudo apt -y install shim
Install shim Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install shim using aptitude by running the following command:
sudo aptitude -y install shim
How To Uninstall shim on Ubuntu 20.04
To uninstall only the shim package we can use the following command:
sudo apt-get remove shim
Uninstall shim And Its Dependencies
To uninstall shim and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove shim
Remove shim Configurations and Data
To remove shim configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge shim
Remove shim configuration, data, and all of its dependencies
We can use the following command to remove shim configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge shim
References
Summary
In this tutorial we learn how to install shim package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.