Posts from 2013-01

Updating DNS Entries (with nsupdate or alternative implementations) – Run Your Own DynDNS Service

Please refer to my newer and more complete blog post on this topic: Deploy Your Own Bind9 based DDNS Server. has stopped serving DynDNS for free to the great public. If have a (virtual) server, you can simply host your own dynamic DNS service. The most common DNS server...

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Public NTP Servers

PTB Servers



Find more NTP servers on:


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VLAN – on Ubuntu, Arch Linux and Mac OS X



sudo apt-get install vlan
sudo su -c 'echo "8021q" >> /etc/modules'
sudo modprobe 8021q

Usage and Configuration

# adding a vlan to a network interface:
ip link add link eth0 name eth0.10 type vlan id 10
# configuring the vlan:
ip addr add brd dev...

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Creating a Video from JPEGs and vice versa

Creating a video from JPEGs

I wrote a Bash script for this purpose:

It first renames the images from something like IMG_9999.JPG, IMG_10000, ... to IMG_00001.JPG, IMG_00002.JPG. Then it reduces the image resolution down to FullHD (1920x1080). The last and most important step: Create a video from the images.

Alternative Approaches

With avconv from...

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