If you’re trying to install FreeCAD on Linux via an appimage and your running into a Squashfs image uses (null) compression, this version supports only xz, zlib error on startup it’s due to a bug in AppImageLauncher. This is a known bug that’s been fixed for a few months but at the time of writing this (2025-08-04) the fix hasn’t been included in any releases yet.

Syncthing rocks. I use it to keep my notes and docs synced between my two laptops and it’s never let me down. Recently one of my laptops went kaput after an OS upgrade and I was forced to set everything up from scratch (including Syncthing). Thankfully it’s pretty easy to set up.