System Options 9999 System action on Ctrl-Alt-Delete keystroke ignore reboot poweroff ignore Ignore key sequence reboot Reboot system poweroff Poweroff system (ignore|reboot|poweroff) Must be ignore, reboot, or poweroff Kernel boot parameters Disable all optional CPU mitigations Disable CPU power saving mechanisms also known as C states Enables and configures pstate driver for AMD Ryzen and Epyc CPUs active passive guided active The firmware controls performance states and the system governor has no effect passive Allow the system governor to manage performance states guided The firmware controls performance states guided by the system governor Dynamic debugging for kernel module Dynamic debugging for Wireguard module System keyboard layout, type ISO2 us uk fr de es fi it jp106 no dk se-latin1 dvorak us United States uk United Kingdom fr France de Germany es Spain fi Finland it Italy jp106 Japan no Norway dk Denmark se-latin1 Sweden dvorak Dvorak (us|uk|fr|de|es|fi|it|jp106|no|dk|se-latin1|dvorak) Invalid keyboard layout us Tune system performance throughput latency throughput Tune for maximum network throughput latency Tune for low network latency (throughput|latency) Global options used for HTTP client #include #include Reboot system on kernel panic Global options used for SSH client #include #include plays sound via system speaker when you can login Enable root partition auto-extention on system boot System time-format 12-hour 24-hour 12-hour 12 hour time format 24-hour 24 hour time format (12-hour|24-hour) 12-hour Disable autosuspend for all USB devices