Bash script: Volume and Brightness [Ubuntu 12.04]

1) Brightness.sh 

Allows you to set up brightness of your monitor using terminal.

Following command is used to set brightness level.

sudo sh -c 'echo <brightness> > /sys/class/backlight/<device>/brightness'

Here <brightness> is brightness level, and takes integer values starting from 0. Higher the value, higher the brightness.

2) Volume.sh 

Allows you to mute or unmute speakers.

Mute

pactl set-sink-mute 0 1

Enable speakers

pactl set-sink-mute 0 0

Here pactl stands for 'Pulse Audio Control'

3) Startup.sh

This script will run every bash script from given directory.

I use this script for switching profiles.

For example if I store brightness.sh and volume.sh in startup_scripts directory and run startup.sh then this startup.sh will run both brightness.sh and volume.sh for me.

	echo "Welcome !!"
	echo $USER
	echo "This will run startup scripts."
	echo "Please authenticate. You need to be a sudoer."
	echo "*********************************************"
	echo "Adjusting Brightness to level 1."
	# sudo sh -c 'echo <brightness> > /sys/class/backlight/<device>/brightness'
	# for <device>
	# cd /sys/class/backlight/
	# ls
	sudo sh -c 'echo 1 > /sys/class/backlight/acpi_video0/brightness'

view raw brightness.sh hosted with ❤ by GitHub

	echo "Welcome " $USER
	echo "Settings up profile"
	cd ../startup_scripts
	# loop over all shell(*.sh) files in directory.
	for f in *.sh
	do
	# Note that you need to change permissions of this file to make it executable.
	./$f
	done
	echo "END of script"

view raw startup.sh hosted with ❤ by GitHub

	echo "killing audio"
	pactl set-sink-mute 0 1

view raw volume.sh hosted with ❤ by GitHub