Turns off the bluetooth hardware module. To turn it back on use `rfkill unblock bluetooth`. Works in Ubuntu, probably in other distros as well. I don't know if you need some special user permission to do this. It worked for me out of the box.

Force computer "idle" state when lid is closed, regardless of inhibitors (power manager) in place, and runs logind preset action (sleep, suspend...). See http://www.freedesktop.org/software/systemd/man/logind.conf.html

Needs to be run in a battery sysfs dir, eg. /sys/class/power_supply/BAT0 on my system. Displays the battery's current charge and the rate per-second at which energy is {dis,}charging. All values are displayed as percentages of "full" charge. The first column is the current charge. The second is the rate of change averaged over the entire lifetime of the command (or since the AC cable was {un,}plugged), and the third column is the rate of change averaged over the last minute (controlled by the C=60 variable passed to awk). The sample output captures a scenario where I ran 'yes' in another terminal to max out a CPU. My battery was at 76% charge and you can see the energy drain starts to rise above 0.01% per-second as the cpu starts working and the fan kicks in etc. While idle it was more like 0.005% per-second. I tried to use this to estimate the remaining battery life/time until fully charged, but found it to be pretty useless... As my battery gets more charged it starts to charge slower, which meant the estimate was always wrong. Not sure if that's common for batteries or not. Show Sample Output