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[2003-06-24] Setting Up Tcp Wrappers on Solaris
Tcp Wrappers is a great program that logs and filters incoming requests for various network services. If you dont already have the source code you can get it from my link in the downloads menu.
[2003-06-11] How can I print to a remote PC that does not have a static IP address?
This is a fairly common problem: you have a PC at home and you make some sort of connection over the internet to your server, but your application needs to print to your PC. That would be easier if your PC had a fixed, constant IP address, but your connection is dynamic so it changes.
There are many, many ways to solve this problem. So many, in fact. that I'll probably miss one or two in this write up. If I do miss something, do let me know: it may help someone else down the line.
[2003-06-05] Hyper-Threading speeds Linux
The Intel Xeon processor introduces a new technology called Hyper-Threading (HT) that, to the operating system, makes a single processor behave like two logical processors. When enabled, the technology allows the processor to execute multiple threads simultaneously, in parallel within each processor, which can yield significant performance improvement. We set out to quantify just how much improvement you can expect to see.
[2003-06-02] Emacs Beginner's Tutorial
Emacs is one of the most popular and powerful text editors used on Linux (and Unix). It is second in popularity only to vi. It is known for it huge feature set, ability to be easily customized, and lack of bugs. It's large feature set and ability to be customized actually are the result of how Emacs was designed and implemented. Without going into all the details, I'll simply point out that Emacs isn't ``just an editor''. It is an editor written mostly in the programming language Lisp.
[2003-06-02] Security Administration with Debian GNU/Linux
Debian has a package manager (DPKG) that resolves dependency problems automatically. It help us to automatically keep up to date programs looking for new versions on the internet, resolving and completing the files and libraries dependencies which a package requires, making system administration easy and keeping us up to date with the new security changes. It also shows some important and substantial security features: it doesn't have commercial goals, also doesn't obey mercantile urgencies, It has a good pursuit of errors, problems are fixed in less than 48 hours and it's priority is to develop a complete and reliable operating system.
[2003-06-02] Triple Threat
Good things come in small packages, but large things aren't always bad either. That must have been the thought someone had in designing an email newsletter for their customers. Apparently they had quite a bit of news; this particular piece of email was 34 megabytes when it arrived at the Mitel SME (E-Smith) server of one of my customers.
[2003-06-02] Device::SerialPort on Redhat 8
The end of life for Redhat 6.2 security updates happened at the end of March. Because of this, I have been upgrading our remote buildings with Redhat 8. Since each building has a T1 router, I wrote a small program to log the routers messages to a text file.
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