Safely Rebooting a Hanging Server

When all else fails, go to the physical server console and hit:
Alt-SysRq R (wait for 21 secs)
Alt-SysRq E (wait for 21 secs)
Alt-SysRq I (wait for 21 secs)
Alt-SysRq S (wait for 21 secs)
Alt-SysRq U (wait for 21 secs)
Alt-SysRq B

Then cross your fingers as the server should reboot

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Problem with grails, maven and spring security

Environment:
Ubuntu 12.04 3.2.0-20-generic-pae kernel
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.1) (6b24-1.11.1-3ubuntu3)
OpenJDK Server VM (build 20.0-b12, mixed mode)

I installed STS 2.9.1 RELEASE which includes apache-maven-3.0.3

I placed the apache-maven-3.0.3 in my PATH environment variable

I created a project with:
mvn archetype:generate \
-DarchetypeGroupId=org.grails \
-DarchetypeArtifactId=grails-maven-archetype \
-DarchetypeVersion=1.3.7 \
-Dversion=1.0.0alpha \
-DgroupId=com.henyo.foobar -DartifactId=foobar

mvn proceeded to download the internet and then created the project folder with the pom file
I modified the pom file to set the source and target to 1.6 as described in the grails manual

I then did:
mvn initialize
which created the grails directory structure

I tried:
mvn grails:run-app
which resulted in the app successfully running

I then tried running just the unit tests with:
mvn grails:exec -Dcommand=test-app -Dargs="--unit"
which resulted in successful build

I then installed the spring security core plugin with:
mvn grails:install-plugin -DpluginName=spring-securit-core

I then tried using the s2-quickstart script:
mvn grails:exec -Dcommand=s2-quickstart -Dargs="com.henyo.foobar.model User Role"
which resulted in a build FAILURE:
[ERROR] Failed to execute goal org.grails:grails-maven-plugin:1.3.7:exec (default-cli) on project foobar: Unable to start Grails: java.lang.reflect.InvocationTargetException: org/springframework/security/core/Authentication: org.springframework.security.core.Authentication -> [Help 1]

It seems that the grails maven integration still needs a lot of work. I suspect this is a dependency resolution issue.

Uploaded a sample project that has this issue: http://dl.dropbox.com/u/5541070/foobar.tar.gz

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Books for Software Development

My updated reading list

Learning Programming
-------------
How to think like a computer scientist: Python Edition
Thinking in C beta 3
The Passionate Programmer


Learning Java
-------------
Head First Java 2nd Ed
How to think like a computer scientist: Java Edition
Objects First with Java
Thinking in Java 4th Ed
Big Java
Agile Java: Crafting Code with Test-Driven Development
Core Java Vol 1 & 2
The Art & Science of Java
The Java Programming Language

Programming Practices
---------------------
The Pragmatic Programmer: From Journeyman to Master
Pragmatic Version control using git
Pragmatic Unit testing in Java with JUnit
Pragmatic Project Automation
Debug It
Ship it
Release it

Learning Basic Web Frontend Development
---------------------------------------
Head First HTML with CSS & XHTML
Head First Javascript
Javascript the Good Parts
Stylin' with CSS: A Designer's Guide (2nd Edition)
Designing with Web Standards by Jeffrey Zeldman and Ethan Marcotte
Web Design for Developers: A Programmer's Guide to Design Tools and Techniques by Brian P. Hogan
Eric Meyer on CSS: Mastering the Language of Web Design by Eric Meyer
JQuery in Action by Bear Bibeault and Yehuda Katz
Handcrafted CSS by Dan Cederholm with Ethan Marcotte

Learning Swing Frontend Development
-----------------------------------
Desktop Java Live
Swing Second Edition
Java Swing

Mastering Software Development
------------------------------
Head First Object-Oriented Analysis and Design
Head First Design Patterns
Code Complete: A practical handbook of Software Construction
Clean Code: A Handbook of Agile Software Craftsmanship
Program Development in Java
The Elements of Java(TM) Style
Effective Java
Practical Java
Design Patterns: Elements of Reusable Object-Oriented Software
Patterns of Enterprise Application Architecture
Domain-Driven Design
Refactoring: Improving the Design of Existing Code
Refactoring to Patterns
SQL Anti-patterns
Modular Java
Growing Object-Oriented Software Guided by Tests
Holub on Patterns:Learning Design Patterns by Looking at Code
Test Driven Development by Kent Beck
XUnit Test Patterns - Refactoring Test Code by Gerard Meszaros
Concurrency Practice in Java
Java Generics and Collections
Java Performance
Java Puzzlers

Methodology and Management
--------------------------
UML Distilled, 2nd Edition
Extreme Programming Explained
The Unified Software Development Process
Rapid Development: Taming Wild Software Schedules
Peopleware: Productive Projects and Teams
The Mythical Man-Month
Software Runaways: Monumental Software Disasters
Software Creativity
Agile Estimating and Planning by Mike Cohn
Agile Software Development, Principles, Patterns, and Practices by Robert (Bob) C. Martin
Agile Retrospectives: Making Good Teams Great by Esther Derby, Diana Larsen, and Ken Schwaber
Succeeding with Agile: Software Development Using Scrum by Mike Cohn
Agile Testing: A Practical Guide for Testers and Agile Teams by Lisa Crispin and Janet Gregory
Extreme Programming Installed by Ron Jeffries, Ann Anderson, and Chet Hendrickson
Behind Closed Doors: Secrets of Great Management by Johanna Rothman, and Esther Derby
Leading Lean Software Development: Results Are Not the Point by Mary and Tom Poppendieck
Lean-Agile Software Development: Achieving Enterprise Agility by Alan Shalloway, Guy Beaver, and James R. Trott
The Art of Agile Development by James Shore and Shane Warden

Mastering Groovy and Grails
---------------------------
Groovy in Action
The Definitive Guide to Grails
Grails in Action
Groovy Recipes
Programming Groovy

Mastering Web Design
--------------------
Web Design for Developers
Head First Web Design
Designing Web Usability

Mastering User Interface Design
-------------------------------
User Interface Design for Programmers
Don't Make me Think
About Face: The Essentials of User Interface Design
Design of Everyday Things
The Non-Designer's Design Book

Mastering Hardcore Stuff
------------------------
Code: The Hidden Language of Computer Hardware and Software by Charles Petzold
The C Programming Language
Structure and Interpretation of Computer Programs
Introduction to Algorithms by CLRS (Cormen,Leiserson,Rivest,Stein)
Compilers: Principles, Techniques and Tools
Test Driven Development for Embedded C
The Art of Computer Programming


- Head First Java
- Head First Object Oriented Analysis and Design
- Head First Design Patterns
- Effective Java
- Concurrency Practice in Java
- Java Generics and Collections
- Java Performance
- Java Puzzlers
- Thinking in Java
- Clean Code


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Trying Ubuntu 12.04LTS Precise Pangolin

I migrated my desktop from Ubuntu 10.04LTS to Ubuntu 12.04LTS.

A few things I needed to add after installation:

• Chromium as my default browser
• adobe-flash to be able to play flash games on facebook
• openjdk-6-jdk for work stuff
• icedtea-plugin to be able to run charting applet on citisec
• pidgin for messaging
• git for more work
• smartgit for routine pushing and comitting to git repos
• smartsvn for routine pushing and comitting to git repos
• STS for work stuff
• DB Visualizer for work stuff
• Virtual Box for desktop virtualization
• Dia for diagramming
• synergy to share one keyboard between my desktop and laptop
• dropbox for personal file sharing
• pencil for mockups
• smplayer for watching videos
• vlc for videos that do not work with smplayer
• git gui for simple git commits
• myqsl-server for development work
• mysql workbench for managing mysql database
• postgresql for development work
• pgadmin for managing postgres database

Should I be replacing stuff on the list with something else? What other stuff have I forgotten to install?

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Protecting ProxmoxVE VMs with IPCop on KVM

I found out a few weeks ago that protecting openvz virtual machines running ubuntu was a bit problematic as I was unable to run UFW on them.

I was able to setup IPCop v2.04 on KVM which will act as a virtual firewall for all of the virtual machines in our ProxmoxVE 2.0 cluster

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