Articles on Linux, the open source operating system

Installing PHP APC on Ubuntu Dapper (and Debian?)


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:

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.

Security Report: Linux versus Windows


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.

On Dennis Ritchie, UNIX and Trademarks


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.

Upgrading Mandrake Linux 10.0 to Mandriva LE2005 10.2


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.

How to setup a modem with Linux


Recently, broadband internet has become so common that the use of modems has dropped dramatically. It has been many years since I had to configure a modem on a computer, let alone do so on Linux. However, modems do still have their uses. I bought a used 3COM 5610 PCI modem in order to be able to fax from Linux, and had to relearn how to configure a modem on Linux again. So, here is what I did.


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