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Appendix C: Ubuntu Command Code
This section contains the code for main commands for Ubuntu.
Brightness
The source code is located in
/sys/class/backlight/backlight.25/brightness
We use “
sudo sh -c "echo 3 >
/sys/class/backlight/backlight.25/brightness” ”
to set the brightness.
The range is between 0 to 7.
Use the command “
cat /sys/class/backlight/backlight.25/brightness”
to
get the brightness information.
System information
Execute uname -a
Linux arm 3.14.52-1.1.1_ga+gb93b878 #15 SMP PREEMPT Mon
Aug 8 19:13:40 CST 2016 armv7l armv7l armv7l GNU/Linux
Execute lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04 LTS
Release:16.04
Codename: xenial