create screenshots on linux (scrot)

1. install package name's scrot 
use the following command

$sudo apt-get install scrot 

2. if you want create screenshot
you must use this following command

$scrot [option][path/file_name]

you can learning option of scrot  by use this following command 

$man scrot 

3. if you want review pictures you must use this following command 

$display path/picture_name