Linux

• Managing EFI Boot Loaders for Linux: EFI Boot Loader Installation
• Fishshell
• Extending statx()
• EXT4: A Minimum Complete Tutorial of Linux ext4 File System
• File systems ext2, ext3 and ext4 (pdf) [local mirror 20210929]

Distros

• Without systemd
  • DeVuan: Debian without Systemd (https://www.devuan.org/)
  • Artix
  • Funtoo