Pandoc: from .txt to .pdf file

pandoc --latex-engine=xelatex -o systemd.pdf systemd.txt

Latex structure

\documentclass{article}
\usepackage[utf8]{inputenc}

\title{Probeersel}
\author{cornelispeek }
\date{July 2018}

\begin{document}

\maketitle

\section{Introduction}
What shall we do \cite{berne} with

\bibliographystyle{plain}
\bibliography{boeken}
\end{document}

You have to name the bibliography file and bibliographystyle before \end{document}

How to run TeX from the command line interface in Linux

• pdflatex [options] filename.tex
• latex [options] filename.tex
• xelatex [options] filename.tex

Index in LaTeX: dit spreekt voor zichzelf.

\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage{imakeidx}
\makeindex[columns=3, title=Alphabetical Index, intoc]
 
\begin{document}
 
\tableofcontents
 
\section{Introduction}
In this example several keywords\index{keywords} will be 
used which are important and deserve to appear in the 
Index\index{Index}.
 
Terms like generate\index{generate} and some\index{others} 
will also show up. Terms in the index can also be 
nested \index{Index!nested}
 
\clearpage
 
\section{Second section}
This second section\index{section} may include some special 
word, and expand the ones already used\index{keywords!used}.
 
\printindex
\end{document}

Latex-page

I have had a lot of problems creating this page:
\documentclass[A4paper]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage{fancyhdr}

\pagestyle{fancy}
\fancyhf{}
\rhead{Share\LaTeX}
\lhead{Guides and tutorials}
\rfoot{Page \thepage}
\newcommand{\french}[1]{\textbf{#1}}

\begin{document}


\section{Voilà}

                                               
Essential French Expression

   Meaning       (where to begin?)
   Literally     there is
   Register      normal, informal
   Pronunciation   [vwah lah]
             IPA   [vwa la]

   Usage notes: Voilà is the quintessential French word – commonly used in
   French, easy to say, and exotic sounding (and therefore used in English
   to give a bit of je ne sais quoi to whatever you’re saying).

   Voilà has any number of meanings, it’s definitely one of those words
   that you pick up a feeling for when spending time with native speakers.
   In the meantime, here are lots of examples to help you understand the
   different uses.

\paragraph{1. Presentation}

   The original meaning of voilà is "there is, there are," as when
   pointing out one or more distant objects to another person. The nearby
   equivalent is voici (here is, here are), but in spoken French, voilà
   tends to be used in both cases, except when a distinction needs to be
   made.
   Voilà notre école.
   Here’s) our school.
   \french{Voici mon sandwich} et voilà le sien.   Here’s my sandwich and there’s his.
\end{document}