Watch WiFi signal strength:
watch -c "nmcli -c yes -f "SIGNAL,BARS,CHAN,RATE,SSID,IN-USE" d wifi list | sort -hrs -k1.6"
or
watch "iw dev wlp2s0 link"
Run a network throughput test using iperf3:
iperf3 -c nas -p 5201 -P 11 -R
Query connected monitor properties:
xrandr --query
Set monitor properties (e.g. scaling and resolution):
xrandr --output eDP-1 --scale 1x1 --panning 2560x1440
https://www.valhalla.fr/2018/07/14/hidpi-on-gnome-desktop/
Set external monitor brightness:
xrandr --output DP-1 --brightness 0.5
Setting up device scale per screen: https://unix.stackexchange.com/a/190011
List all modules not digitally signed:
find /lib/modules -name '*.ko' -exec grep -FL '~Module signature appended~' {} \+