If you work regularly with remote machines or use online services like Gitlab, you are probably using an SSH key. And if you have not updated it recently, chances are you are using an RSA key, or, god forbid, an ECDSA or DSA key. Well, bad news: in order to be on the safe side, you should probably upgrade. A presentation at BlackHat 2013 reported significant advances in solving the problems on which DSA and some other key types are based. The presentation suggested that keys based on elliptic curve cryptography (ECC) should be used instead: ECDSA or Ed25519. Additionally, ECDSA and DSA have nasty additional issues, so you should probably just stick to Ed25519. Here’s how to upgrade.

It is nowadays commonplace to upload your valued photos to online services that don’t respect your rights like Flickr, Google Photos or Instagram. While these sites have a social component that may help you build an audience and have a wider reach, usually their terms and conditions are abusive to end users. In this post I’ll be discussing how to create your own static HTML photo gallery that you can host on your website using thumbsup, a static gallery generator written in Python that produces totally customizable photo galleries. You can host your high resolution photos in your private server and have the gallery link to them. The photo gallery on this very site is generated using this method.

I have been using DuckDuckGo as my search engine of choice for the last few years. Howerver, DuckDuckGo seems to have a few problems:

1. It is based in the US, arguably not the most privacy-respecting jurisdiction in the world.
2. Only part of their source code is open.
3. Uses Amazon Web Services (AWS) as a cloud provider and Cloudfare CDS.
4. It looks like their browser was caught tracking visited websites per user.
5. At the end of the day, you can’t really know that they are telling the truth when they promise not to track you.

In this post, I’m discussing Searx, a better alternative to DuckDuckGo that is truly open and driven by the community.

A couple of years ago I wrote a blog post about my Linux setup at the time. Well, understandably a lot of things have changed since then, and instead of updating a two year old post, I think writing a new one from scratch with the same principle and using the same template makes more sense. It is always fun to go back and read these old posts, and I fully expect that this one post will be as enjoyable for me in a few years time.

In the past few weeks I have been implementing a couple of features into Gaia Sky. The first is the addition of variable star rendering. The second is the re-implementation of all point cloud render systems to use actual geometry (triangles) instead of point primitives. This post briefly offers a preview of these features.

In the Linux world, a display manager is a little GUI program that presents the user with a login screen right after boot, allows her to enter her login credentials and choose the desired desktop environment or window manager. The most common ones are gdm (the default in Gnome), kdm (same for KDE), lightdm (originally written for Ubuntu’s Unity DE) and lxdm (for LXDE). There also exist a bunch of arguably simpler terminal-based display managers like ly, cdm or nodm.

But for most users a fully featured display manager may be a bit too much bloat. You can achieve the exact same functionality by simply using the default shell login and a single command. Everything in this post applies only to X11 (sorry Wayland users).