Who’s there? – Invalid ssh user

So, It’s been a while since I’ve set up my home server to use it as a swiss army knife at home and on the road.
Now I was wondering on the system’s integrity.
First step was checking /var/log/auth.log
To do some quick’n’dirty check I’ve ran the following command

grep “Invalid user” /var/log/auth.log | less

Continue reading Who’s there? – Invalid ssh user

Open Data in the city of Ghent

Yesterday was my first visit to a GentM event.
The topic of the evening: “Open Data”. (Someone even mentioned Smart Cities)

Someone (didn’t catch the name) talked about the digitalized University Library Ghent.
They pointed out that they’ve already gathered a lot of data and made it publicly available.
On the top of their homepage, there’s a link to available downloads and API’s for the people wanting to be creative with their data.

Next up was Pieter Colpaert, the father of the famous iRail going for word domination.
Pieter explained how iRails started, how they do it, and their goal (which is world domination).
His presentation:

After the awesome talk of Pieter, the microphone was passed on to Bart Rosseau.
Bart works as the Strategic Communication Advisor for the city.
He shared the view of the city on Open Data and what they want and will do for the public.
He noted that it’s obviously not as simple as just opening everything up to everyone, as there are privacy concerns etc…
He promised that there will be data available starting somewhere in the middle of May on http://gent.be/open
Probably on the 14th of May (source: appsforghent.be)
His presentation:

It’s not clear on which data will be placed in the public domain and/or under which license the data will be put.
So let’s keep our eyes open for changes on the http://www.gent.be/open page.

After his talk I’m glad I can conclude that there’s awareness on Open Data and Open Source within the city ​​council.

New items on my wishlist

Thanks to Zhann, whom pointed out to these 2 fine books, my wishlist got (even) longer.

1. Time management

This collection of time management tools addresses the very specific needs of embattled system administrators everywhere. Bestselling author Thomas Limoncelli shows you how to manage interruptions, eliminate timewasters, prioritize based on customer expectations, automate processes for faster execution, and much more. It’s the first step to a more productive, happier you.

Time management

2. UNIX and Linux System Administration Handbook!

This twentieth anniversary edition of the world’s best-selling UNIX system administration book has been made even better by adding coverage of the leading Linux distributions: Ubuntu, openSUSE, and Red Hat Enterprise Linux.

This book approaches system administration from a practical perspective and is an invaluable reference for both new administrators and experienced professionals. It details best practices for every facet of system administration, including storage management, network design and administration, email, web hosting, scripting, software configuration management, performance analysis, Windows interoperability, virtualization, DNS, security, management of IT service organizations, and much more.

UNIX and Linux System Administration Handbook!

So, mom if you read this and you’d like to surprise me with something… This is it!!! You know I love you! 😉

Twirssi error: Timestamp out of bounds

I just found my twirssi inactive. 
When loading the script and authenticating with oath enabled, I got the error:

-!- Irssi: Error in script twirssi:
Timestamp out of bounds

This is (most likely) the result of a wrong system date/time.
Quite easy to solve, just sync it to an NTP server.
Open a terminal and enter:

ntpdate pool.ntp.org

Try to load the script again and login.
All should be fine now.

Wrong time in Windows on Dual Boot system.

When you have a dual boot with Windows and Ubuntu you might experience some time travelling when rebooting to windows.
To solve this, simply boot into Ubuntu and edit the /etc/default/rcS file as sudo and change the UTC value from yes to no.
It should look like this

UTC=no #Set according to your system (BIOS) clock.

These values are being used by the scripts at /etc/rcS.d/ that get invoked during boot (even in single user mode)

To be clear, this is not an Ubuntu error. It is simply the Windows that never assumes the system-clock to be in UTC.

If you wish to adjust this in the Windows installation execute regedit and navigate to:


Change the RealTimeIsUniversal value to 1.

If you’re simply looking for a wach to change your hardwareclock on linux you can check my other article on Changing date and/or time on Linux.