These are joke systemd logos meant to be printed onto a black t-shirt. The original systemd logo was taken from https://brand.systemd.io/.
Here are the files to download.
| original logo | tshirtdised logo | |
|---|---|---|
| svg | transparent, black | transparent, black |
| transparent, black | transparent, black |
I have tried out the black BIO T-SHIRT "PREMIUM" from https://printplanet.de/ and I am quite satisfied with the result. I simply uploaded the transparent svg-file and placed it in the centre.