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May 21st, 2010
You were a true friend. I'm saddened by your death.
"I wonder what life 500 years from now will think looking back at this
period of time, and what it is we take for granted as fact now that will
be proven ignorant somewhere along the way. Cool. :)" - Dan Moschuk,
August 2009.
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OpenBSD 4.7 Install movie
May 13th, 2010
Like I usually do I make an install movie with vmware of the latest BSD. Here
is OpenBSD 4.7:
Too be honest I attempted this movie 3 times. There is some things I noticed
while making it. First if you specify the X server to start immediately it's
sorta hard getting a config file since "Xorg -configure" won't work with a
running server. Second vmware seems to slow down with every attempt at making
the movie so it drags on, just fast forward the parts that are slow.
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Added a bit of style (CSS)
May 13th, 2010
I've been attending 3 classes of learning how to use CSS (cascading style
sheets) and I've learned a bit. These are the changes I've put in place
after the first class and I like them. Notice the hovering on the right
side that's new. Also if you went through this site a little you may have
found the hackepedia backups which I've attempted to translate to german.
That has a bit of style as well. Enjoy.
BTW have you noticed the changes on the english wikipedia as well?
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Article in the BBC about IPv4 address exhaustion
May 11th, 2010
I think I've blogged about this before. The predicted date is September 9th,
2011 when all IPv4 addresses are given away. Here is the article. To quote the article...
Companies are being urged to get working with IPv6 now, to forestall any problems caused by the shortfall.
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My new computer: conceived
May 10th, 2010
On january 27th, I blogged
about my 24 year old history with computers. I have now decided on a new
computer and it'll take a considerable chunk of my savings. The computer
is going to be built with upgradeability in mind, so that 3, 5, 7 years
down the road I can upgrade it to what is decent then. Basically I'll be
getting an Intel Core i7-930 with 8 GB of RAM (2x4GB DDR3 modules) and
a 160 GB Intel SSD
, BluRay burner and a
wicked socket 1366 motherboard.
Also I'll get a semi-decent graphics card with 1 GB of RAM. The store
I got an estimate on priced it all at 1625 Euros, and since I have to get
some other things like speakers I'm counting on paying around 1700+ euros.
This computer by no means is a top-of the line, but it's powerful nontheless
and I think I can call it my own personal supercomputer. ;-)
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The non-latin character domain names
May 10th, 2010
This was all over the news a few days ago. Basically Egypt, Saudi Arabia
and UAE now have the TLD (top level domain) in their language now. The
DNS system basically piggybacks a code (really
punycode) representation
of the unicode for these domains. It's still in ASCII downbelow, take a
look:
country | punycode equivalent |
Egypt | .XN--WGBH1C |
Saudi Arabia | .XN--MGBERP4A5D4AR |
United Arab Emirates | .XN--MGBAAM7A8H |
source: IANA.ORG
So it's not a glitch in the sytem if you see something like
domainname.xn--wgbh1c that's just egypt instead of it's previous domainname.eg.
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Learning from Hackers
May 7th, 2010
I was once a system administrator. One system I administered was BSD/OS and
it had a "gcc" group in /etc/group. The other administrators thought it was
a good idea to restrict gcc to a set of people who asked to have gcc access.
One guy didn't ask and he exploited the fact that the "ld" and "as" commands
were not in the gcc group. He created an assembly file possibly with FreeBSD
and then copied that over and assembled and linked the possibly very compatible
assembly file. I thought the guy was brilliant and I want to show you
rudamentally what he did, watch.
romeo$ uname -a
FreeBSD romeo.solarscale.de 7.2-RELEASE FreeBSD 7.2-RELEASE #1:
Wed May 5 21:28:23 CEST 2010 pjp@romeo.solarscale.de:/usr/
src/sys/i386/compile/ROMEO i386
romeo$ cat -n hello.c
1 #include <stdio.h>
2
3 int
4 main(void)
5 {
6 printf("hello, world\n");
7 }
romeo$ cc -S -o hello.s hello.c
juliet$ uname -a
NetBSD juliet.solarscale.de 5.0.1 NetBSD 5.0.1 (GENERIC) #0:
Thu Jul 30 01:39:11 UTC 2009 builds@b8.netbsd.org:/home/bui
lds/ab/netbsd-5-0-1-RELEASE/i386/200907292356Z-obj/home/build
s/ab/netbsd-5-0-1-RELEASE/src/sys/arch/i386/compile/GENERIC i386
juliet$ as -o hello.o hello.s
juliet$ ld -static -o hello /usr/lib/crt0.o hello.o -lc
/usr/lib/crt0.o: In function `___start':
: undefined reference to `_fini'
/usr/lib/crt0.o: In function `___start':
: undefined reference to `_init'
juliet$ ld -static -o hello /usr/lib/crt?.o hello.o -lc
juliet$ ./hello
hello, world
juliet$
Let that be a lesson to anyone. I sure learned from this guy.
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Educating the me
April 30th, 2010
I've started attending a class for CSS (cascading style sheets). The main
purpose is that I have a lot of HTML documents (including this blog) that
could use a bit of style. I've already written a style sheet for this blog
in a test environment and will be putting it up perhaps next week.
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Random Hackepedia
April 30th, 2010
The RH for this week is Traceroute.
BTW if you're interested in contributing to hackepedia it now allows
people to edit without logging in.
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Playing with compression, fail.
April 25th, 2010
I made a small program that can compress a file on less space than gzip. It
was fun writing it and under nominal conditions it performs very well. The
reason this design didn't make it into our list of programs is because if the
conditions aren't favourable and it hits an out of disk space problem then
repairing itself is next to impossible. So it isn't used. But you can still
study the failings of programs to understand why working programs work well.
Inside the program source code you'll see a typescript clip from the program
working better than gzip, but add a bit more space in the sparsefiles in the
filesystem it explodes badly.
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