Booting process - MichaIng/DietPi GitHub Wiki

First boot process

On the first boot of a fresh DietPi install. The systemd services are launched in the following order:

  1. DietPi-FS_partition_resize: Inflate root partition and file system to 100% of available disk space
  2. DietPi-RAMlog: Mount tmpfs on /var/log and copy empty log files from disk
    1. DietPi-PreBoot: Detect SBC model and apply CPU governor settings
    2. DietPi-FirstBoot: Apply AUTO_INSTALL settings from dietpi.txt
  4. DietPi-PostBoot: Print login banner

Then, when you login /etc/bashrc.d/dietpi.bash is executed and loads /boot/dietpi/dietpi-login:

  1. Load DietPi-Globals to shell session
  2. Print DietPi-Banner and lincense agreement prompt
  3. DietPi-Update
  4. DietPI-Software: Further firstrun setup prompts and steps are applied

Normal boot process

The following services are launched in this order:

  1. DietPi-RAMlog: Mount tmpfs on /var/log and copy empty log files from disk
  2. DietPi-PreBoot: Detect SBC model and apply CPU governor settings
  3. DietPi-PostBoot: Check for DietPi updates, start software services, run custom user scripts and print login banner

Then, when you login /etc/bashrc.d/dietpi.bash is executed and loads /boot/dietpi/dietpi-login:

  1. Load DietPi-Globals to shell session
  2. Print DietPi-Banner and in case start DietPi-Autostart choices