Some stuff that happened to me and how I solved it or that I found helpful.

Bash

• Load .env file in current context: (Ref, Archived)
  • loadenv.sh

    set -o allexport; source .env; set +o allexport

  • Usage e.g. source loadenv.sh

Booting

Missing Windows entry from Grub

Problem: autodetect was disabled during update-grub

• sudo nano /etc/default/grub

   GRUB_DISABLE_OS_PROBER=false

• sudo update-grub

Logging

cron spams auth.log (Debian 11)

• in /etc/pam.d/common-session-noninteractive, insert line session [success=1 default=ignore] pam_succeed_if.so service in cron quiet use_uid before line session required pam_unix.so (Debian Ticket) (Ref, Archive)

Hardware / driver

USB errors: device descriptor read/64, error -32 and similar

(for me) fix was to enable IOMMU in Bios and set kernel boot option iommu=pt (Ref, Archived)

• BIOS: ENABLE IOMMU
• sudo nano /etc/default/grub

  GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=pt"

• sudo update-grub