How To Install byteman on CentOS 8

byteman is Java agent-based bytecode injection tool

Introduction

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

What is byteman

Byteman is a tool which simplifies tracing and testing of Java programs. Byteman allows you to insert extra Java code into your application, either as it is loaded during JVM startup or even after it has already started running. The injected code is allowed to access any of your data and call any application methods, including where they are private. You can inject code almost anywhere you want and there is no need to prepare the original source code in advance nor do you have to recompile, repackage or redeploy your application. In fact you can remove injected code and reinstall different code while the application continues to execute.

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

Install byteman 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 byteman using dnf by running the following command:

sudo dnf -y install byteman

Install byteman 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 byteman using yum by running the following command:

sudo yum -y install byteman

How To Uninstall byteman on CentOS 8

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

sudo dnf remove byteman

byteman Package Contents on CentOS 8

/usr/bin/bmcheck
/usr/bin/bminstall
/usr/bin/bmjava
/usr/bin/bmsubmit
/usr/share/byteman/bin/bmcheck
/usr/share/byteman/bin/bminstall
/usr/share/byteman/bin/bmjava
/usr/share/byteman/bin/bmsubmit
/usr/share/byteman/contrib/jboss-modules-system
/usr/share/byteman/contrib/jboss-modules-system/byteman-jboss-modules-plugin.jar
/usr/share/byteman/lib/byteman-install.jar
/usr/share/byteman/lib/byteman-sample.jar
/usr/share/byteman/lib/byteman-submit.jar
/usr/share/byteman/lib/byteman.jar
/usr/share/doc/byteman
/usr/share/doc/byteman/README
/usr/share/java/byteman
/usr/share/java/byteman/byteman-agent.jar
/usr/share/java/byteman/byteman-install.jar
/usr/share/java/byteman/byteman-jboss-modules-plugin.jar
/usr/share/java/byteman/byteman-jigsaw.jar
/usr/share/java/byteman/byteman-layer.jar
/usr/share/java/byteman/byteman-sample.jar
/usr/share/java/byteman/byteman-submit.jar
/usr/share/java/byteman/byteman.jar
/usr/share/licenses/byteman
/usr/share/licenses/byteman/copyright.txt
/usr/share/maven-metadata/byteman.xml
/usr/share/maven-poms/byteman
/usr/share/maven-poms/byteman/byteman-agent.pom
/usr/share/maven-poms/byteman/byteman-install.pom
/usr/share/maven-poms/byteman/byteman-jboss-modules-plugin.pom
/usr/share/maven-poms/byteman/byteman-jboss-modules.pom
/usr/share/maven-poms/byteman/byteman-jigsaw.pom
/usr/share/maven-poms/byteman/byteman-layer.pom
/usr/share/maven-poms/byteman/byteman-root.pom
/usr/share/maven-poms/byteman/byteman-sample.pom
/usr/share/maven-poms/byteman/byteman-submit.pom
/usr/share/maven-poms/byteman/byteman.pom
/usr/share/maven-poms/byteman/tests.pom

References

Summary

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