Linux

Ubuntu is a very popular Linux distribution. There are many variants, including Kubuntu (Ubuntu with a KDE desktop), Edubuntu (education oriented Ubuntu), ...etc.Now there is a new edition: Christian Ubuntu. No, it is not a joke. It is real. It includes the Bible, as well as web parental control software. Here is the announcement on the Ubuntu Forums.Of course, something like that would always invoke jokes, such as this blog called Ubuntu Christian Edition Facts. It clearly says that it is a joke.

I needed to update by development server, which is also a home network server, which has Samba, NFS, autofs, NIS as well as the usual LAMP stack, and CVS, subversion, and other tools.

The move was to be  synchronized with my moving from Mandriva to Ubuntu server as well.

Pentium 4 with ASUS P4S8X-MX

Initially, I bought a nice used Pentium 4 2.4 GHz, but it it was unstable and kept rebooting under load. Later, I found out that  the  CPU was defective  and  I am waiting for Intel to send me a replacement. The machine is also based on ASUS P4S8X-MX, which has no lm-sensors support, so CPU and motherboard temperatures and fan speed cannot be monitored on Linux.

Update: this article is for Ubuntu Dapper Drake (6.06). If you are using later versions, or other Linux distributions, then visit the following links:

• Installing PHP APC on GNU/Linux Gusty Gibbon 7.10 and (Debian).
• Installing PHP APC on GNU/Linux CentOS 5.

APC is a op-code cache for PHP that eliminates the parsing and compiling of script(s) for every page hit. Unlike Zend, it is truly free, and seems to have a lot of commuity momentum behind it lately.

As with all optimizations, there is a trade off. APC can use more memory on your server than without it.

The instructions below assumes that you have full control of your server, whether a physical dedicated server or a virtual private server.

Although one can always compile from source, this is more time consuming than using Debian's excellent apt-get.

Here is how I did it on two machines, with one more to go.

A often repeated fallacy is that Windows is more prone to security vulnerabilities because it has the largest installed base among desktops and servers, both at home and in the corporate world. The fallacy says that if Linux and Apple had a similarly large installed base, they would also be found to be vulnerable.This claim seems to be widespread even among those who are technically savvy. The facts do contradict this claim. For example, Apache is the most widely used web server on the internet, with more web sites running it than all others combined. Apache is not found to be prone to attacks and security issues as much as Microsoft IIS for example.

In the mid 1990, I came to know of a fungicide being sold under the UNIX name.

At the time, I was working in Saudi Arabia for AT&T after its acquisition of NCR, and the general manager called me in to ask about this matter.

I told him that from what I know, trademark law does not cross domains. This means the use of UNIX in domains other than computers is permitted.

I send that info to the late Dennis Ritchie, the father of UNIX, and he put it on his site under Other UNIXes.

After upgrading from Mandrake Linux 10.0 to Mandriva Linux LE 2005 10.2, I found out that there is a serious issue with either Mandriva or with kernel 2.6.11.

This article describes the issues faced upon upgrade, adn how to work around them.

In February 2005, Mandrake Soft of France and Conectiva of Brazil, announced that they merged. Shortly afterwards, in April 2005, they announced that they are changing their name to Mandriva. Then they released Mandriva Limited Edition 2005 (LE2005) which is what Mandrake 10.2 should have been.

Since I have several machines at home, all running Mandrake, it was time to start the annual upgrade to stay current.

My brother Omar is a business man with a background in economics and business.

Linux is an open source general purpose operating system. Over the years, several people have used it in embedded systems. Now, Linux is in PDAs, Cell Phones, Routers, MP3 Players, Set Top boxes, and much more.

This article provides a wealth of information on the use of Linux in embedded systems.

One often comes across objections to using free software in commerical packages. These objections are often not based in reality but rather misperceptions, and FUD (Fear, Uncertanity and Doubt).

In this article, I will try to explore these objections, and counter them by facts.