RHEL 6 Postfix Aliases
IntroductionIn my previos blog I described to configure and run MTA with postfix. Here I will describe how to make aliases.ConfigurationStartCreate aliasNow to let this take effect you must run the...
View ArticleRHEL 6 Configure an MTA to Forward (Relay) Email Through a Smart Host.
IntroductionA relay mail server (MTA) is a intermediate server that forwards email to the final delivery mail server (MDA), i.e. writes message to default store /var/spool/mail/${USER}.Remote Client...
View ArticleRHEL 6 Synchronize Time Using Other NTP Peers
IntroductionIn this blog will I show how to setup a NTP server and perform NTP synchronizing on remote server.Server InstallationServer ConfigurationThe server IP is 192.168.1.240 and is located in...
View ArticleHelpful CSS Cheat Sheets
Very good comprehensive CSS cheat sheets summarized on one single page http://slodive.com/freebies/css-cheat-sheets/.
View ArticleCloning Machine in KVM and Getting "Device eth0 does not seem to be present”
To fix this problem follow http://aaronwalrath.wordpress.com/2011/02/26/cloned-red-hatcentosscientific-linux-virtual-machines-and-device-eth0-does-not-seem-to-be-present-message/.
View ArticleClik here to view.
Overview EE and JBoss EE Compliance
Overview of EE evolutionThe capabilities and what is supported out of the box in EE, is increasing from next version to next version. The drive behind the new feature are:Common task are finally...
View ArticleHow to Deploy Sources and Javadoc Jar
When deploying a snapshot release or if you by some other reason want to generate sources or javadoc jar, you could always configure maven-source-plugin and maven-javadoc-plugin and hook them in maven...
View ArticleList JNDI Tree Entries with JBoss CLI
To list all JNDI entries with JBoss CLI.First start JBoss CLI.Then execute.
View ArticleHow to Manage Properties Files in JBoss Module
From JBoss AS 7 and EAP 6 forth, classloading have changed and all jar dependencies are packaged and loaded as jboss modules.Besides dependency jar in a module you also might need to be able to...
View ArticleClik here to view.
Taking Snapshot in Ubuntu
When taking snapshot in Ubuntu you could always use the predefined keyboard shortcuts, see https://help.ubuntu.com/community/KeyboardShortcuts#Desktop_shortcutsA better tool is to use the...
View ArticleJava EE 6 Interceptors 1.0 (JSR318)
IntroductionInterceptor was in EE 5 introduced in EJB 3.0, see EJB3 Interceptors javax.ejb.AroundInvoke. In EE 6 that was taken out and made generic into Interceptors (JSR318), package...
View ArticleJava EE 7 Deployment Descriptors
Deployment descriptors are like configuration files.The below sites summaries all xml schemas defintions for all EE 7 deployment...
View ArticleJava EE 6 Maven Dependency
The EE 6 classes are available in maven central.But when running unit test against them you receive the below error. Thats because they do not contain implementation classes, only api class.So in...
View ArticleJava EE 7 Maven Dependency
In my previous blog about Java EE 6 Maven Dependency a wrote about the crippled javaee-api maven dependency in maven central.That is finally fixed in EE 7.See also Essential Maven POM For JavaEE 7
View ArticleClik here to view.
SyntaxHighlighter
Supported styling.https://github.com/rwz/SyntaxHighlighter/blob/master/demos/autoloader.html
View ArticleThe Java EE 6 Interceptors
IntroductionThe AOP Interceptor was in EE 6 introduced and was before only supported with additional libraries such as aspectj and jboss-aop.Before using Interceptor one should first really consider if...
View ArticleUnderstanding LDAP and LDAP Authentication
IntroductionIf you let an IT administrator pick a persistence storage technique, he would probably choose a LDAP directory. But if you asked a system developer, then he would probably choose a RDBMS...
View ArticleClik here to view.
Using LDAP as Address Book in Thunderbird
In my previous blog I described how to setup OpenLDAP. In this blog I will describe how to use it as address book in thunderbird.Open Preferences by clicking on menu Edit -> Preferences.Select...
View ArticleLDAP Authentication in Tomcat 7
Introduction Tomcat ConfigurationBefore starting we need to understand the Tomcat configuration (Context) hierarchy. Tomcat configuration can be placed in three places. - In...
View ArticleUse Log4J in Tomcat 7
IntroductionTomcat uses default Java SDK Logging, which is in mine opinion, generates default log files that are hard to read and it is also quite silly to reinvent the wheel, because there is already...
View Article