====== Linux ======
  * [[linux:update-alternatives|Update-Alternatives]]
  * [[linux:linux-as-router|Linux as router with iptables]]
  * [[linux:linux-own-service|Create own service]]
  * [[linux:backup-with-dd|Backup USB-Storage with dd (and gzip)]]
  * [[linux:raspberry-headless-setup|Setup Raspberry headless]]