Overview

This article gives a basic overview of how to create dynamic menus for your .net web pages.

There are three important controls to designing your dynamic menu:

• web.sitemap Control
• SiteMapDataSource Control
• Menu Control

The web.sitemap Control

The Sitemap control is an XML file that contains information about your dynamic menu. It stores your menu in a series of nested tag controls. Add this to your project by right-clicking on your project and selecting Add->New Items->Web->Site Map

Overview

This document describes how to create a fault tolerant load balancer cluster using LVS and Keepalived on Debian Lenny. LVS works off of internal firewall marks that are added to incoming packets by iptables. The example here uses firewall mark 100 to manage this internal routing for the load balanced IP address 192.168.1.100. Note that LVS uses decimal 100, where iptables uses the hex equivalent (0x64).

There is a great command line JMX client available at http://crawler.archive.org/cmdline-jmxclient/index.html which allows you to query everything JMX. This is especially useful for a quick insight into the health of your Java server. It can also be used for monitoring, but beware that every time it is run a new JVM instance is created.

The hardest parts of talking to Active Directory (or LDAP) are first learning the query language, and second figuring out what is 'good' to query and what is not. This document will focus on how to talk to active directory in a way that is quick, accurate, and most importantly easy to understand.

Recently I encountered the need to figure out if all the terminated employees from my organization had been disabled within Active Directory, and if all their priveleges had been revoked. Unfortunately, there is no simple way to do this, so I decided to build a report using MSSQL, SQL Server Integration Services, and the .NET DirectoryServices library using the Common Language Runtime (CLR). This tutorial assumes a basic familiarity with SQL Server Interation Services (SSIS), Visual Studio, and other Microsoft development tools.

configure: error: C compiler cannot create executables
See `config.log' for more details.

What?!? Isn't that the entire purpose of a compiler?!?

As of Java 1.5, there is native SNMP support built in to the JVM. To enable it, there are three Java flags that need to be set. For Tomcat, these should go in the CATALINA_OPTS variable.

1. -Dcom.sun.management.snmp.port=snmp-port

   Assuming you are not running your JVM as root (you're not, right? RIGHT?!?), snmp-port must be higher than 1024 on a Unix-based system. 9161, for example.

Upgrading from MySQL 5.1

Backup Current Data

Create a backup of your database

mysqldump --opt --all-databases | gzip > ~/mysqldump.sql.gz

Make a separate backup of the `mysql` database, which will come in handy if any recovery operations are required.

mysqldump --opt --databases mysql | gzip > ~/mysql.sql.gz

Also, make a copy of the MySQL configuration files

tar -C /etc -czf /etc/mysql.tar.gz mysql

Remove MySQL 5.1

Now that there are sufficient backups, MySQL 5.1 can be uninstalled.