Termbright is a program that changes the brightness of the screen in a simple way from the terminal

set brightness at 50%

$ termbright 50%

adds 10% brightness to current brightness

$ termbright +10%

removes 10% brightness at current brightness

$ termbright -10%

for compile and put the binary in ./bin/termbright

$ chmod +x makefile.py
$ ./makefile.py

for compile and put the binary in /usr/bin/termbright

$ chmod +x makefile.py
$ sudo ./makefile.py install

for compile and put the binary in ./bin/termbright

$ chmod +x makefile.py
$ ./makefile.py -c

for compile and put the binary in /usr/bin/termbright

$ chmod +x makefile.py
$ sudo ./makefile.py install -c

the location of the folder where the brightness files are located

list of capabilities in linux