Securely removing files and folders

Mehrad Mahmoudian published on April 11, 2022

12 min, 2207 words

Abstract

This is a general post to explain why and how to remove/delete files on a Linux system in a secure way. As usual, I will add some explanation on why and then get to how. Although I encourage you to read the explanation part, you of course have the freedom to jump right into the solution section.

Rollback Flatpak and Snap packages

Mehrad Mahmoudian published on March 23, 2022

3 min, 472 words

Abstract

In this short post I briefly explain how to rollback (i.e install previous version) of a software that you have installed using Flatpak on Snap. This is useful especially when the new version does not work as expected.

Extracting payment info in rasterized invoice

Mehrad Mahmoudian published on July 02, 2021

4 min, 728 words

Abstract

In this short article I will explain how I have put together an OCR and a barcode reader and converter using FLOSS (Free and Libre OpenSource Software) so that I can pay the bills I have got from my phone based on an image of an invoice I got on my desktop computer.