jonhat on Twitter — Need local admin and have physical access? Plug a Razer mouse (or the dongle), windows Update will download and execute RazerInstaller as SYSTEM, then abuse elevated Explorer to open Powershell with Shift+Right click.
Btrfs Set To Land Support For IDMAPPED Mounts In Linux 5.15 — Back when IDMAPPED mounts functionality was added to the Linux kernel, the initial implementation came for FAT and EXT4. XFS support has also been in the works while now for Linux 5.15 the Btrfs support appears ready.
IDMAPPED Mounts Aim For Linux 5.12 - Many New Use-Cases From Containers To Systemd-Homed — Idmapped mounts make it possible to easily share files between multiple users or multiple machines especially in complex scenarios. For example, idmapped mounts will be used in the implementation of portable home directories in systemd-homed.service(8) where they allow users to move their home directory to an external storage device and use it on multiple computers where they are assigned different uids and gids.