This editorial was written on a cold winter evening.
A lot of snow outside. It is the time to look back and think about Linux.
Linux Weekly News has again published a very nice timeline (lwn.net/2001/features/Timeline).
Generally speaking 2001 was the year when the stock market collapsed
and of course this has some impact on Linux. However the classic Linux
companies are all still there and a lot of projects are not directly
commercially funded. Linux will therefore definitely continue to expand.
Looking back on LinuxFocus we can see that the number of readers
are growing faster. The meeting in Bordeaux
this year was an important
event and a good
opportunity to to get to know each other. It was as well a possibility
to meet other people involved in Linux documentation and related
projects. Those personal contacts helped e.g to improve the LinuxFocus
server network. At the same time many languages are still maintained by
just one or two persons (Russian, Portuguese,...). Especially translating
articles is very hard work and takes time. We all have a lot of respect
for the work that individual Linux enthusiasts are doing here. If you are
still looking for a project where you can contribute from time to time to
Linux then do not hesitate to contact the editor of your language. Proof
reading articles is as well still a problematic area and any extra help
is very welcome.
At a restaurant in Bordeaux, July 2001.
From left to right: Guido and Katja Socher (linuxfocus), John Reuning (ibiblio),
John Perr (linuxfocus), Guylhem Aznar (linuxdoc), Egon Willighagen
we can be very satisfied about the outcome of the ongoing LinuxFocus and
Linux activities. We have our daily problems but the public awareness of
Linux is really growing and its future will certainly be exciting.
Happy New Year!
Chrooting All Services in Linux
Chrooted system services improve security by limiting damage that
someone who broke into the system can do.
Writing CDs with Linux
Katja and Guido Socher
This article explains several ways to burn CDs under Linux.
The LinuxFocus Tip
How to make images smaller? Our normal experience is that you can
always make a picture smaller without loosing quality. This is however
an experience from the "analog world". Scaling down a digital image
is done by taking away pixels. If you reduce a 600 pixel wide
image to 300 then you take away every second pixel.
Fig. 1: original image
Fig. 2: scaled down image
Fig. 3: blured + scaled down
This reduction of pixels makes the things not only smaller but as well
very distorted. This can be seen in Fig. 2 which is just half the size
(actually 1/4th but discuss this with your math teacher) of
The picture looks that much distorted because some lines that used to be
continuous in the original image are occasionally interrupted because pixels
are missing. There is a simple but surprising trick. You need to blur
the image before scaling it down. In Gimp this is
Filters->Blur->Gaussian_blur. Choose blur radius 1. The blur effect
makes the pixels a bit wider by putting gray pixels besides the black ones.
This reduces of course contrast and quality of the original image but when
reducing the size of an image it avoids that some lines are totally
interrupted and this improves the quality of the scaled down image.