Implementing a basic debug mode for your Ruby CLI

We should all strive to handle all possible errors in our programs and display nice error messages to the users, but one can hardly be sure that nothing will ever go wrong. That’s why I believe we should try to embed a debug mode that users can take advantage of when submitting the issue or solving the problem. Luckily this is very simple thing to do. Continue reading

Editing XFA PDF forms on Linux/Fedora

PDF should be this nice universal format that many government institution now work with. But what if they require you to fill in XFA forms inside their template PDFs? The ones I need to fill for my insurance company are certainly not supported in the standard Document Viewer shipped with Fedora. This weekend I tried installing Master PDF Editor and guess what? It works like a charm for me. They even offer various RPM builds for CentOS 6/7. And they work on my Fedora out of the box. Lucky me. Thanks a lot for this!

Trusted SSL certificates with Let’s Encrypt and NGINX

letsencrypt.org is the new awesomeness that happened to SSL on the web. Forget over-priced trusted certificates or self-signed certs for your side & pro bono projects. Try trusted SSL in seconds for free instead :). If you choose to use Let’s Encrypt I want to show you what needs to be done on a pretty average Fedora VPS with NGINX server and how to avoid certbot errors like urn:acme:error:unauthorized and urn:acme:error:unknownHost. Continue reading