System

Baseline Debian/Ubuntu system configuration.

Key Parameters

Variable	Default	Description
`system_hostname`	inventory hostname	Set the system hostname
`system_timezone`	`Europe/Amsterdam`	System timezone
`system_auto_upgrades`	`false`	Disable unattended-upgrades (prevents surprise reboots)
`system_passwordless_sudo`	`true`	Allow sudo group to run commands without password
`system_umask`	`002`	Default UMASK for new files
`system_upgrade_mode`	`dist`	Package upgrade mode: `dist`, `full`, or `safe`
`system_extra_packages`	`[]`	Additional APT packages to install
`system_wifi_powersave_disable`	`false`	Disable WiFi power saving via systemd oneshot
`system_wifi_auto_reconnect`	`false`	Periodic ping check; bounce interface on failure
`system_wifi_interface`	`wlan0`	WiFi interface name
`system_wifi_check_interval_sec`	`60`	Reconnect check interval (seconds)
`system_wifi_check_target`	`1.1.1.1`	Ping target for connectivity check

Set hostname (if system_manage_hostname is true)
Configure passwordless sudo for the sudo group
Set system-wide UMASK
Disable automatic updates
Run full package upgrade
Install extra packages
WiFi reliability: disable power saving and/or enable auto-reconnect (if either flag is true)