Category «operating_systems»

Quick overview over nearby wireless lan hotspots

Here is a useful little command to get a quick overview over nearby hotspots: iw dev wlan0 scan | grep ‘SSID\|signal\|primary channel’ SSID: 5g_station * primary channel: 36 signal: -42.00 dBm SSID: 2g_station * primary channel: 6 signal: -72.00 dBm iw dev wlan0 scan | grep ‘SSID\|signal\|primary channel’ SSID: 5g_station * primary channel: 36 signal: …

vimrc for latex

Ah yes – finally – blog post time again :) Since I am currently writing a lot of latex with vim I thought I backup share my ~/.gvimrc on my blog: 1 2 3 4 5 6 7 8 9 :setlocal spell spelllang=en_us " enable spell checking (Ctrl x + s for suggestions) :set wrap …

Puppet

I started to roll out puppet to manage our servers at work and have to say I am impressed. It really changed the way I think about managing systems and is so much cleaner and easier to understand than the ‘traditional’ way. Just being able to automate often repeated steps like enabling LDAP access or …

Connecting two monitor to a NVIDIA card without the proprietary driver

For a long time I searched for a way to connect two monitors to an NVIDIA graphic card without using the proprietary nvidia driver (mainly because I wanted to try use OpenBSD and 64bit FreeBSD). Somehow I never read nv’s (the free Xorg driver) man page – until today. And there it is, clear as …

Ken Thompson on Security

I just stumbled on a very good article by Ken Thompson on computer security: Reflections on Trusting Trust In this article Ken shows how easy it is to alter a compiler  to compromise all binaries created with it. Although 24 years old this article is a very interesting read.

us_de Keyboardlayout

The more I used it, the more unhappy I became with the us-intl keyboard layout. Especially all the dead keys (keys that may modify the following key e.g. ” + a to write √§) made typing tiresome. Always typing a space after double quotes is really not suited for programming. I found a good tutorial …

cups woes

I just tried to get cups working and had the following problem: I have a Lexmark Optra E+ parallel port printer and usually cups shows the parallel port as Device: on the second configuration screen. Only this time cups did not recognize the parallel port. lptest > /dev/lpt0 worked fine, just cups could not see …

Always compile audacious with dbus

When I compiled audacious without dbus support yesterday I did not know it would break all application options (i.e. entering audacious -f on a shell skips to the next track) . Today I read a bit in the audacious sources and found that it has to be compiled with dbus support in order to work.

k3b on FreeBSD

Today I configured k3b on FreeBSD. The building from ports works fine (although it took almost all morning. But then again k3b depends on most of KDE ;-)). Turns out all I had to do was to enable the ATAPI/CAM Driver: link

Running ion3 on FreeBSD

I just started to try out FreeBSD 7.0 (I am very impressed so far) and ran into huge problems installing my favorite window manager ion3 . Apparently the main developer had some trouble with various distribution maintainers and forbade then to ship ion (link). After some try and error (and a pointer in the right …