Category Archives: Linux

Ubuntu/Debian Installer: Overriding preseed values using boot kernel parameters

When using a pressed file there’s a vicious circle if you also want to pass boot parameters: Because you pass the preseed path using boot parameters (e.g. url=http://path/to/preseed.cfg) the installer has to interpret the boot parameters first and can then … Continue reading

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Tracking aircrafts using a software defined radio

While reading Raspberry Pi in the sky: How to build this awesome $115 airplane tracker my <10$ SDR (software defined radio) came to my mind. It’s a RTL2832U based DVB-T USB stick I did purchase a year ago. So after … Continue reading

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Connect HD44780 LCD via USB

I wanted to use one of these cheap hd44780 1602 LCDs (16×2 characters) to display some stats of my headless server. Lcdproc is suitable best for doing this. But how to connect the LCD to to the server?

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Serial console on Raspberry Pi

When operating the Pi headless in unknown environments often the only way to access it is to connect via ssh. But what to do if the Pi does not work in that environment better said is not accessible via ssh … Continue reading

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How to turn an old laptop into an ethernet sniffer

I had to investigate the network traffic of an ethernet-bound device. My plan was to visualize the data sent and received on my laptop using wireshark or similar tools.

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Running Ubuntu 15.04 (and up) on a non-PAE cpu

Ubuntu stopped support for non-PAE systems with release 12.04. But it isn’t that complicated to get an actual ubuntu run on a non-PAE system: Just compile the kernel yourself. So you have to install build-essential linux-source and kernel-package, then extract … Continue reading

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Linux live CD with SSH (sshd) enabled

Since grml (https://grml.org/) provides the possibility to pass a command line parameter (ssh=<password>) to start the sshd inside the live system it’s the perfect base for creating an ssh-enabled-live-usb-system. Download your flavour (i586/amd64, the grml-small suites our needs) of grml … Continue reading

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