Currently I work on visualizing the health of components, nodes and web-services. Therefore respective components expose their status with a health-check. For a Restful Webservice a simple ping request (simple GET with Status-code 200) is ok. A more advanced technique would be response with a brief summary of status and version. This status I want to illustrate with an appropriate symbol.
To configure JBoss to log certain messages of log category (class) is a simple way. This post illustrates two ways to achieve it.
Using the JPA (Java Persistence API) 2.0 with Hibernate for a database integration test against a in-memory db like H2 or HSQLDB, is a good way to test the JPA ORM (object relational mapping). In the process, errors might occur depending on the database vendor. Following example illustrate a problem with Hibernate and HSQLDB.
The Logitech Wireless Presenter R400 is not working properly under Ubuntu 14.04. This post provides a solution, how to get the presenter working properly.
Existing (private) ssh keys may have a password. If you want to alter the password, the ssh-keygen command will reassign the pass phrase to the existing private key.
The patch command is a feature that was added in JBoss EAP 6.2. Following post demonstrates the patching process.
A fresh JBoss EAP installation, has no web console activated. It requires a management user for that. This article explains the basic steps how to activate the management web console.
This article describes SSD caching for the HDD drive on a new Ubuntu Linux installation. The contents might as well apply to Debian Jessie.