Howto Screenshot in Centos 6x

Simple way, in order to make a screenshot in Centos 6.x
[rx@localhost ~]$ cat /etc/redhat-release 
CentOS release 6.8 (Final)

[rx@localhost ~]$ uname -a
Linux localhost.localdomain 2.6.32-573.el6.x86_64 #1 SMP Thu Jul 23 15:44:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

[rx@localhost ~]$ su -

Install this by typing:
yum install gnome-utils

 S a m p l e  of Screnshoot: