Hacked and exploited! 13 Aug 2020 9:14 AM (4 years ago)
During the last 2 or 3 years there have been various pieces of evidence that my electronic systems have been the target of malicious hacker groups in Greece and some very important things I had been working on since 2015, which are basically methodologies for data analysis, have been stolen and traded in online black…
How to tail log entries through the systemd journal using Python 26 Nov 2016 8:03 AM (8 years ago)
This post describes how to use the Python bindings of systemd in order to follow and parse log entries of a specific service in real time through systemd's journal. This is an alternative way to tail log files which can be very easily customized.
Prevent text wrapping inside the pre HTML tag 25 Nov 2016 4:03 AM (8 years ago)
While doing some maintenance work on my web site, I noticed that the text of long lines inside the pre HTML tags wrapped. I’m quite certain this kind of text wrapping did not occur in the past. After experimenting with the developer tools of Firefox for a while, I noticed that the white-space property of…
How to set the Expires header correctly in Varnish 24 Nov 2016 5:04 PM (8 years ago)
This post provides the required VCL code and describes how to dynamically set the Expires header whenever an object that has been cached by Varnish is requested.
How to terminate running Python threads using signals 23 Nov 2016 4:02 PM (8 years ago)
This post outlines some important details you should know in case you plan to use signals to terminate a Python script that uses threads. A sample code snippet is also provided as an example that shows how it works.
Maintenance time 23 Sep 2016 5:02 AM (8 years ago)
It’s been several years since the last time I did any maintenance work on the web site. Time permitting during the following weeks I intend to check the published tutorials for outdated information, possibly remove posts that are not about technical things, clean up a non-WordPress directory containing various scripts and RPM SPEC files I…
Things to avoid when using the installation wizard of MediaWiki 23 Sep 2016 4:52 AM (8 years ago)
Using MediaWiki's web based installation wizard while various authorization and other security mechanisms are in place throughout Apache's configuration contexts can lead to problems which are very hard to troubleshoot. This post outlines some things you should avoid while installing MediaWiki.
Fixing the robots.txt content type of Redmine at CodeTRAX 16 Sep 2016 8:01 AM (8 years ago)
This post describes how I addressed an issue with the content type of the robots.txt file of my Redmine installation at CodeTRAX, so that the indexing bots could properly evaluate it and thus index only those sections of the web site that are meant to be indexed.
Back to blogging 13 Feb 2013 6:53 AM (12 years ago)
Well, it’s been a while since my last post and I think it’s about time I started posting some new stuff here. During all these months I spent my free time οn various things. As far as tech is concerned I mostly spent time on Linux servers and a little bit on software development. Digging…
Some thoughts about Copyright related activism 29 May 2012 7:13 AM (12 years ago)
There has been much controversy about Copyright and file-sharing on the internet during the last decade. Admittedly, the All Rights Reserved statement is incompatible with the nature of communications in the Digital Age and thus a new more flexible content and media licensing scheme is required. A permission system based on licenses would be the…