The GNU/Linux commands alphabet
Display and sound stacks are huge. Control them can be tricky. Here's how to tame them.
alsamixerset your speakers on fire.
aplay / arecord-lL to list the devices and PCMs.
arandrindispensable GUI for xrandr
pacmdtalk during runtime with the server.
xbacklightfull brightness in the morning but set -50 after dusk.
xclipread/write from/into the clipboard
xrandrtake the control of your multi-monitor station.