follow this step:
!- sudo apt-get install lsb-release scrot
2- wget http://github.com/downloads/djmelik/archey/archey-0.2.8.deb
3- sudo dpkg -i archey-0.2.8.deb

How to add it to start up of every shell you open.
sudo nano /home/YOUR_USER_NAME/.bashrc
Go down to the bottom of the file and add either archey or screenfetch
Press ctrl+x hit y to save and enter to confirm.

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