Mark Clarke's blog

How to configure email for BackupPC

BackupPC is a great piece of software that makes the setup and management of backups of servers and workstations a breeze. If configured correctly it will allow for a complete disaster recovery solution. Since it primarily backs ups to disk it is also a cheap, or cost-effective solution. One of the steps often left out of the many setup guides for backuppc on the internet is configuring mail for sending event notifications.

JPA - Understanding PersistenceContext in Java Persistence API

One of the most important things when dealing with any system is having a model in your mind of how the system works. As with most abstractions it is not necessary that the model reflects how the system is implemented as long as it allows one to make accurate predictions on how certain actions will result in predictable events. The model may even be wrong but seem to work. I have a very bad model for how my Microwaves and Video player work and hence am restricted to using only a couple of buttons.

Why does Neotel dig up the same trench over and over again?

I don't know about the rest of Johannesburg but in Randburg it seems that Neotel keeps on digging up the same trench every few weeks. They have dug up the road and pavement at least twice in front of our offices and about three times on Main road.

I have been late for work now on more occasions than I care to count because of those guys laying out orange pipes.  Not to mention the wear and tear on my car from the tank traps that are left behind for unsuspecting motorists.

How to compile a custom kernel for Fedora/Redhat/Centos

As a rule I prefer not to compile custom kernels on rpm and apt based distros unless absolutely necessary. If I know I am going to have to customise the kernel before hand, I prefer to use a source based distro such as Gentoo. That way there is nothing that gets in your way of the simple, make menuconfig=>make install=>make modules=>make modules_install=>mkinitrd (if necessary) recipe for success. Most times for debian and redhat based distros you can get by with just installing the kernel headers and then building your special module form there. 

How to run ASP on apache

Recently we had to take over a project where the original developers had decided to use Microsoft's active server pages (asp) as the development language. We had to temporarily maintain this site while it was re-developed in Drupal. Needless to say this was a nightmare.

How to have Xandros Scalix edition run Scalix web front-end as its default site

By default Xandros Scalix edition runs the Scalix web front-end on port 9090. This is quiet annoying as in most cases the mail server is dedicated and you won't be running any other services on it. Least of all another web service running on port 80. In addition most clients expect just to type in a normal looking url and trying to explain port mappings to their users is just a pain.

How to get ATI's Big Desktop working on Ubuntu Hardy Heron (8.04)

Hardy Heron was officially released last week and has been receiving rave reviews across the Internet. I had upgraded my home machine to the beta version of Hardy about a week before the official release and must say I was impressed . I waited for the official release before upgrading my work laptop.

Ubuntu 8.04 Hardy Heron - Freaking cool

On my home machine I have been running Gentoo for years. Using Gentoo has been a real good, if some what painful way to learn how Linux works deep down inside and how open source applications come together to provide a complete solution . Over time though the productivity drain has just become too much. After my last kernel recompile my audio went. The latest alsa drivers would not work, so I thought - stuff it. Time to switch the last remaining computer to Ubuntu. Now I can have bleeding edge without the pain.


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