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The blog about all and nothing

Mai 03 2017

SCM progress visualization with gource

Do you want to impress your customers / friends by showing what you and your team are doing within a project ? ... Well then give gource a try ! ...

Apr 19 2017

How to make static webpage snapshots with wget

Sometimes it is better to have a (local) backup. Here is how you backup a (foreign) homepage with wget. ...

Mrz 13 2017

Read /etc/passwd with Java8 streams

This article shows how to read and parse the /etc/passwd file with the new Java8 stream API and Lamda functions ...

Feb 20 2017

How to install node-red in Ubuntu

This article shows how to install node-red under Ubuntu 16.04 ...

Jan 21 2017

Uninstall dpkg packages in Ubuntu

This article shows how to remove *.dpkg packages (which are not removable via the software center) from an Ubuntu box ...

Dez 30 2016

How to replace a failed disk of a degraded linux software raid

Recently one of my disks within a Linux software raid started to fail. Here is a quick outline how to replace it. ...

Nov 18 2016

Select files with a dialog witin a BASH script

Sometimes you want the user to pick a few files from within a directory - here is how to do it in bash. ...

Okt 28 2016

How to push data into a new gitblit repository

This article shows how to push data into a new repository which is hosted on gitblit ...

Sep 20 2016

Renewal of a letsencrypt certificate for lighttpd

This article shows how to renew a letsencrypt certificate, which is used by a lighttpd server. ...

Aug 28 2016

Free SSL certificate for lighttpd with letsencrypt

This article shows how to install the free SSL certificates from letsenrcypt on a lighttpd webserver ...

Aug 20 2016

How to publish weatherdata via MQTT

This article shows how to connect a weather station to the Internet of things ...

Jul 18 2016

Helloworld with Apache Camel using Ivy and Ant

This example shows how to build a Hello World Application for Apache Camel. Dependencies are fetched with Ivy and buids are done with Ant. ...

Jun 14 2016

Better notes with pandoc

This article shows you how to create beautiful minutes of meeting with pandoc ...

Mai 17 2016

How a keysigning party builds a web of trust

Did you ever attend a key-signing party ? ... No ? ... In this article I am telling you what it is, why it is cool, and what the next steps after the party are ...

Apr 10 2016

Create snapshots via commandline in ESXi 5.5

This article shows how to create snapshots in an ESXi5.5 server via ssh commandline. ...

Mrz 15 2016

Optimizing the MQTT topic structure of the KEPServerEx

This article shows how to gain the most benefit of the IoT Gateway from Kepware by optimizing the MQTT topic structure ...

Feb 24 2016

Attach a NFS datastore to ESXi 5.5

Is your virtualization box running out of disk sapce again? Try to connect a NFS datastore to it. This article shows how to conenct a QNAP nas to ESXi 5.5 ...

Feb 09 2016

How to rename an application within IIS7

Renaming an application within IIS7 is not possible via the graphical user interface. This article shows how to do it via the command line. ...

Feb 05 2016

OpenLDAP authentication for vTiger 6.0

This article shows how to enable LDAP authentification for vTiger 6.0 against an OpenLDAP server ...

Jan 17 2016

Add social buttons to XWiki

This article describes how to add a social panel (with facebook and twitter buttons) to the XWiki system and how to prepare the blog application to get optimal social linking. ...

Jan 03 2016

How to create a RAM disk

Sometimes (for example in software defined radio application with high bandwidths or video editing) you need ultimate read and write speed on your disks. The solution therefore is to utilize a RAM disk. Here is how to setup such a thing ...

Dez 15 2015

Download multiple files with similar names within bash

Downloading multiple documents from the same location (Document_01.pdf, Document_02.pdf, ..., Document_30.pdf) from a webserver is a time consuming task. Here is a small script that shows you how to automate it in bash ...

Dez 02 2015

APRS with mobilinkd and YAAC

APRS is an interesting way to communicate. This article shows how to set up an APRS station with your PC and a mobilinkd TNC2. ...

Nov 21 2015

Auto reconnect on dropped VPN connection

This article shows a way how to re-establish a VPN connection which get disconnected (for whatever reason) from time to time ...

Nov 07 2015

Automotive 2-channel PWM dimmer

This article describes how to build a 2-channel PWM dimmer for automotive applications. ...

Okt 19 2015

IPTV with a Synology DS713+

This article describes my approach to stream live TV across my local network with my Synology DS713+, a few USB receivers, Tvheadend and an Amazon FireTv Stick with Kodi as receiver ...

Okt 11 2015

Monitoring WiFi signal strength / quality with ubuntu

This article shows a simple too how to monitor your WiFi signal quality under ubuntu ...

Aug 12 2015

Lexmark CX410 scan to network (on a SME Server)

Most multifunction scanners are able to scan to a plain windows network drive. If you want to scan to a samba share then things can be a little bit tricky. This article shows what to do if you scanner fails to scan to a network drive which is provided by a samba share on a linux box.
...

Jul 06 2015

Bypass restrictive firewalls with a SSH tunnel

Assume you are sitting in a restaurant that offers free wifi. Sounds great - doesn't it ?
Did you know that it is really easy to sniff a big part of your internet traffic (including passwords) in such an environment ?  Here his how to circumvent such privacy issues... ...

Jun 28 2015

Reset GLPI passwords in the database

From time to time users are forgetting their passwords for webapplications. Normally there is a "forgot password" link to reset it. If this is not the case then you can reset passwords of webapplication directly in the database. This article shows how to do this with GPLI. ...

Jun 23 2015

Autostart a program on the Raspberry Pi

Sometimes you need to start a program on a server (or a Raspberry Pi) during the boot process. Here is how to do it ... ...

Jun 09 2015

Raspberry PI as kiosk display

The Raspberry Pi is ideal for the automated display of webpages. This article shows how to set up a simple kiosk. ...

Jun 04 2015

Performance of the Hutchinson / Drei LTE bundle: HUI 30

Living in rural areas is nice - the only thing you may miss is a stable high speed internet connection. I had the chance to test a LTE internet connection in such an environment - here are the results ...

Jun 03 2015

SqlServer CPU utilization

Have you ever wondered how much CPU your MS-SQL Server uses - here is how to find it out. ...

Mai 26 2015

Building a cheap FLARM basestation antenna

FLARM is an electronic device to selectively alert pilots to potential collisions between aircraft.. The accessoirs (like antennas) are known to be expensive. This article shows how to build a 5 Euro ground plane antenna for a FLARM ground station which is perfectly suited to operate with the rtl-sdr based Open Glider Network receive. ...

Mai 11 2015

Running SkyDemon under Linux with wine

My flight instructor showed me a cool flight-planning tool named SkyDemon. Unfortunately it is not available for Linux, but with wine it can be installed on my machine. Here is how to do it ...

Apr 12 2015

Locking down a Baofeng UV5R+ to disable unintentional TX

This article shows how I modified my Baofeng UV5R+ to disable unintentional TX operation and how to lock it down that it becomes "family-safe" ...

Mrz 25 2015

Fix the no-mic problem with the Baofeng UV5R+

Bad or broken connectors within the Baofeng UV5R+ can cause the internal microphone to stop working. Fortunately there is a simple workaround to thisI ...

Mrz 08 2015

Fetching google calendar events with python

Google calendar is a wonderful tool. This article shows how to fetch events from a given set of calendars with python. ...

Feb 24 2015

Eclipse is not able to install plugins

Recently i had to install new plugins for my IDE: Eclipse luna ... At the first try it did not work - and here is why ...

Feb 18 2015

Crack (ZIP) passwords with John the Ripper

This article shows how to install JohnTheRipper on a Ubuntu machine and how to crack (by bruteforce) a zip file ...

Feb 06 2015

Changing the frequency of a HM-TRP 3DR Radio

The HM-TRP 3DR Radio is often used for telemetry purposes in DIY drone projects. Depending where you are from you will get it in different flavours (433 MHz, 470 MHz, 868MHz and 915 MHz).  This article shows how to change the main frequency of this TRX to make it work on 433 MHz (70cm HAM / ISM band). ...

Jan 18 2015

Windows Explorer: Search by filename

Have you ever wondered why the Windows explorer does not find your files ? ... Propably because Windows doesnt search the way you would think. ...

Jan 01 2015

Meshed HAM Radio - High Speed Multimedia Network

What if i tell you that it is possible to set up a self healing WLAN with nearly zero configuration - Impossible ? ... Nope: Try a meshed WLAN. ...

Dez 26 2014

Truncate a MSSQL Server Database Logfile

Are you running out of disksapce again because MSSQL Server is eating all your diskspace? ... Well then its propably time to truncate the logfile -> Here is a simple solution to this problem. ...

Dez 14 2014

Aviation Headset to USB Adapter

As a hobby pilot i bought myself a good aviation headset. Since it is very comfortable to wear i decided to connect it to my computer. This article describes how i built an adapter for this. ...

Dez 09 2014

Portable HAM radio station

As a HAM radio operator I spent a lot of time to design my station. It should be (at least somehow) portable and it should allow all band / all mode operation. In this article i want to share some thoughts about the hobby and about my station with you. ...

Nov 02 2014

Remove all Windows recycle bins

Is your windows machine low on harddisk space again ? ... Try to delete ALL recycle bins on your drive (and not only yours) - this will free some memory for you ! ...

Okt 26 2014

Receive APRS stations with rtl-str and display them with Xastir

This article shows how to receive APRS packets with a cheap DVB-T stick operated by rtl-sdr, how to decode them with mulitmon-ng and finally how to visualize them with Xastir. ...

Okt 22 2014

Transfer a virtual machine between two ESXi Hosts

This article shows how to transfer data (VMs) between two hosts without the need of external tools. Furthermore it explains different strategies and compares them in terms of speed. ...

Okt 11 2014

RTTY File transmission via soundcard

File transmission via Network, USB Stick, Floppydisks, WLAN is cool, but did you how to use the soundcard to transmit a file from A to B. ...

Sep 24 2014

Automatically kill hung windows applications

Running a server under Windows is a nice thing and in general this works pretty well but sometimes programs are crashing. But how to get rid of those hung applications on an unattended Winsows server ? - Have a look into the article. ...

Sep 22 2014

Using vim editor as integrated development environment

The vi-improved editor (aka vim) is more than just a plain editor. With the right commands at hand you can use the vim editor as a complete IDE to write, compile and fix code. ...

Sep 14 2014

Removing old Linux kernels from ubuntu

Do you want to remove all unused kernels from your ubuntu installation - here is a simple solution ! ...

Sep 09 2014

Creating an animated gif from a bunch of jpg files

In opposite to my other blogpost about creating flash videos from images there is another interesting method to create videos: Animated gifs! ...

Sep 07 2014

Rendering timelapse videos from daylight webcam images

In my last post is howed you how to fetch periodically images from a raspberry pi. This time we are generating a timelapse video out of it that consists just of daylight images. ...

Sep 01 2014

Quick and dirty high-resolution webcam

Do you want to run a webcam ? ... Propably a cheap one with a high resolution ? -> here is the solution with a raspberry pi ...

Aug 28 2014

ASCII - Art youtube player

Are you sitting in front of a linux text terminal and do you want to watch youtube videos ? ... Here is a possible solution how to do it without X. ...

Aug 20 2014

How to backup OTRS 3.0

If you ever have to backup your OTRS installation - here is the howto. ...

Aug 19 2014

MSSQL 2012 - Database in Recovery Pending State

What to do if your MSSQL2012 database is in a "Recovery Pending" state. ...

Aug 18 2014

Bluelog - the fast bluetooth scanner

Have you ever wondered how traffic flow analysis in a big city works ? ... Well here is one (possible) answer: Track bluetooth devices traveling along a road.Bluelog is a quick (a really quick) bluetooth scanner and therefore an ideal candidate for this application. This article discusses the installation on ubuntu as well as some other possible applications.

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X Forwarding with the Rasperry Pi

This article shows hot to use your Raspberry Pi in a remote fashion from another linux machine by forwarding the display of the X Server. ...

Aug 13 2014

Reattatch an existing VM to ESXi 5.5

What to do if you want to add an existing virtual machine to a new ESXi server ? Simple answer: Add it by commandline. ...

Aug 04 2014

Efficient CSV analysis with H2

From time to tome i get a huge csv file (200k+ Lines with 60 columns) form one of our customers. These monsters are pretty hard to handle / analyze within Excel or OpenOffice but luckliy there is another solution for all of you who can write SQL statements ! ...

Jul 20 2014

406 MHz ELT Testing with rtl-sdr and Multipsk

How to test your 406 MHz distress beacon without the need to spend hundreds of dollars for testequipment. ...

Jul 14 2014

Lazy mans oracle update guide (10g -> 11g)

Oracle updates can be very tricky. Here is a small solution how to upgrade a single database form Oracle 10g to 11g. ...

Oracle 10g - Certificate error in IE

Have you ever expierienced the "Internet explorer cannot display this page because there is a problem with the certificate of this site" - error when youtry to connect to Oracle 10g database control ? ... Well then i have bad news for you. ...

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