Density Functional Theory (DFT):
Crystal Structure Databases:
American Mineralogist Crystal Structure Database
Crystallographic Database for Minerals and Their Structural Analogues
ICSD Web: the Inorganic Crystal Structure Database
Wyckoff positions:
Wyckoff Positions - Bilbao Crystallographic Server
Crystal softwares:
CIF2Cell: CIF2Cell is a tool to generate the geometrical setup for various electronic structure codes from a CIF (Crystallographic Information Framework) file.
Linux:
Introduction to Linux - The Linux Documentation Project
Introduction To Linux - Linux.org
News and feature lists of Linux and BSD distributions
Useful softwares:
G3DATA for extracting data from graphs.
Python:
A Crash Course in Python for Scientists
Install XePersian on Linux-mint using command-line:
sudo apt install texlive-latex-base texlive texlive-xetex texlive-lang-arabic texlive-latex-recommended
Install revtex on Linux-mint using command-line:
sudo apt-get install texlive-publishers