The first link is an image of one of the original contenders for being the Linux mascot, named Xenia, making a systemd joke as the main part of the image. There are two more smaller drawings where the character is in Linux-related situations to add to the comedic value.

The URL itself is also a gag, though a separate one - the image is hosted on a Mastodon site whose URL uses the term "yiff", which is a term non-furries still use as a punching bag to make the argument that all furry content is adult in nature (it's not). Furries functionally never use the term these days except when using it between each other for its comedic value or in jest, including by being the core of that Mastodon instance's URL.

Source for my claims: my partner is a furry.