How To Install grubby on CentOS 8

grubby is Command line tool for updating BootLoaderSpec files

Introduction

In this tutorial we learn how to install grubby on CentOS 8.

What is grubby

This package provides a grubby compatibility script that manages BootLoaderSpec files and is meant to only be used for legacy compatibility users with existing grubby users.

We can use yum or dnf to install grubby on CentOS 8. In this tutorial we discuss both methods but you only need to choose one of method to install grubby.

Install grubby on CentOS 8 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install grubby using dnf by running the following command:

sudo dnf -y install grubby

Install grubby on CentOS 8 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

CentOS Linux 8 - AppStream                                       43 kB/s | 4.3 kB     00:00    
CentOS Linux 8 - BaseOS                                          65 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - ContinuousRelease                               43 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - Extras                                          23 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - FastTrack                                       40 kB/s | 3.0 kB     00:00    
CentOS Linux 8 - HighAvailability                                36 kB/s | 3.9 kB     00:00    
CentOS Linux 8 - Plus                                            24 kB/s | 1.5 kB     00:00    
CentOS Linux 8 - PowerTools                                      50 kB/s | 4.3 kB     00:00    
Extra Packages for Enterprise Linux Modular 8 - x86_64           13 kB/s | 9.2 kB     00:00    
Extra Packages for Enterprise Linux 8 - x86_64                   24 kB/s | 8.5 kB     00:00    
Metadata cache created.

After updating yum database, We can install grubby using yum by running the following command:

sudo yum -y install grubby

How To Uninstall grubby on CentOS 8

To uninstall only the grubby package we can use the following command:

sudo dnf remove grubby

grubby Package Contents on CentOS 8

/usr/lib/.build-id
/usr/lib/.build-id/eb
/usr/lib/.build-id/eb/1e62b87b443000f58668d4019e5cbb279ee33c
/usr/libexec/grubby
/usr/libexec/grubby/grubby-bls
/usr/libexec/grubby/rpm-sort
/usr/libexec/installkernel
/usr/libexec/installkernel/installkernel-bls
/usr/sbin/grubby
/usr/sbin/installkernel
/usr/share/licenses/grubby
/usr/share/licenses/grubby/COPYING
/usr/share/man/man8/grubby.8.gz
/usr/share/man/man8/installkernel.8.gz

References

Summary

In this tutorial we learn how to install grubby on CentOS 8 using yum and dnf.