1. Introduction to LaTeX
LaTeX is a document markup language and document preparation
system for the TEX typesetting program. Within the typesetting system,
its name is styled as LaTeX. LaTeX refers only to the language in
which documents are written, not to the editor used to write those
documents. In order to create a document in LaTeX, a .tex file must be
created using some form of text editor.

2. How To Install LaTeX
Type the following command to install LaTeX:
$ sudo apt-get install texlive-full

3. Certificate Creation Using LaTeX
Requirements:
Install LaTeX using command: sudo apt-get install texlive-full
Need datatool.sty file or install this package for importing csv file.
Need data.csv file which contain information retrieved from
database .
Here is the example of csv database file
Name,Dep,photo
Rajdeep,Information Technology,img/index1.jpeg
Mandeep,Information Technology,img/index1.jpeg
In the above, img is the folder which contain photos of people

4. LaTeX Input File Structure
The first command in any LaTeX file normally determines the
global processing format for the entire document.
documentclass[options]{class}
The possible values of class are: article,book, report or letter.
The options available allow various modifications to be made to
the formatting, like selecting font size — 10pt, 11pt, 12pt,
specifying paper size — letterpaper, legalpaper,executivepaper,
page formats — onecolumn, twocolumn etc.
The following command starts the document:
begin{document}
Now you enter the text mixed with some useful LaTeX commands.
At the end of document add the following command
end{document}

5. Preamble
Preamble is the portion between documentclass and
begin{document}. This can contain package loading command
like usepackage{ packagename }. Any number of usepackage
command can be issued or alternatively you can give the
packagenames as a comma separated list in a single usepackage
command.
A typical preamble of a LaTeX document will look like:
documentclass[a4paper,11pt]{article} //class
usepackage{setspace} //for spacing between lines
usepackage{graphicx} //for including images
usepackage{color} // for including colors
begin{document}

6. Adding Image
includegraphics[options]{filename}
Following are the options available in includegraphics command:
width - The width of the graphics (in any of the accepted TEX
units).
height -The height of the graphics (in any of the accepted TEX
units).
totalheight -The totalheight of the graphics (in any of the accepted
TEX units).
scale -Scale factor for the graphic. Specifying scale=2 makes the
graphic twice as large as its natural size.
For e.g--includegraphics[width=.92linewidth]{logo.png}

7. Retrieve Data From CSV File
The following package is required to include database file as .csv
usepackage{datatool}
data.csv includes information from database
DTLloaddb{name}{data.csv}
Variables are used to fetch the data from csv file
DTLforeach{name}{
name=Name, dep=Dep, photo=photo}
Here we called the variables
This is to certify that{large{name}}

8. Compilation of LaTeX Input File
The following command will produce certificate.pdf which have
multiple certificates.
$pdflatex certificate1.tex
If you want to convert pdf to jpg images, Here is the method:
1. First install imagemagic tool using command: sudo apt-get
install imagemagick
2. Create the folder named jpg
3. Run the following command to convert pdf file to jpg images:
$convert -density 300 certificate1.pdf jpg/certificates.jpg

9. Thank You