RockBian

The file /boot/armbian_first_run.txt is sourced by a bash script (/usr/lib/armbian/armbian-firstrun-config), but only if the file /root/.not_logged_in_yet exists.

On modern disks (modern as in the last 25+ years) the heads don't have to be parked. When you remove the power, the heads are automatically parked. The momentum of the rotating disk is used to provide the energy.

On my system it are symlinks to /sys/..: $ ls -l /dev/fan* lrwxrwxrwx 1 root root 41 Feb 19 17:50 /dev/fan-p6 -> /sys/devices/platform/p6-fan/hwmon/hwmon6 lrwxrwxrwx 1 root root 41 Feb 19 17:50 /dev/fan-p7 -> /sys/devices/platform/p7-fan/hwmon/hwmon5 Those are generated by an udev rule: $ cat /etc/udev/rules.d/90-helios64-hwmon.rules # Helios64 persistent hwmon ACTION=="remove", GOTO="helios64_hwmon_end" # KERNELS=="p6-fan", SUBSYSTEMS=="platform", ENV{_HELIOS64_FAN_}="p6", ENV{_IS_HELIOS64_FAN_}="1", ENV{IS_HELIOS64_HWMON}="1" KERNELS=="p7-fan", SUBSYSTEMS=="platform", ENV{_HELIOS64_FAN_}="p7", ENV{_IS_HELIOS64_FAN_}="1", ENV{IS_HELIOS64_HWMON}="1" KERNELS=="2-004c", SUBSYSTEMS=="i2c", DRIVERS=="lm75", ENV{IS_HELIOS64_HWMON}="1" SUBSYSTEM!="hwmon", GOTO="helios64_hwmon_end" ENV{HWMON_PATH}="/sys%p" # ATTR{name}=="cpu", ENV{IS_HELIOS64_HWMON}="1", ENV{HELIOS64_SYMLINK}="/dev/thermal-cpu" # ENV{IS_HELIOS64_HWMON}=="1", ATTR{name}=="lm75", ENV{HELIOS64_SYMLINK}="/dev/thermal-board" ENV{_IS_HELIOS64_FAN_}=="1", ENV{HELIOS64_SYMLINK}="/dev/fan-$env{_HELIOS64_FAN_}" # ENV{IS_HELIOS64_HWMON}=="1", RUN+="/bin/ln -sf $env{HWMON_PATH} $env{HELIOS64_SYMLINK}" LABEL="helios64_hwmon_end"