A simple template for a lab report using LaTeX. Ensure that you have LaTeX installed:
sudo apt-get install texlive-latex-recommended
This will install the most commonly used packages, and then you can always install extra as needed. If you prefer the full version, yo can use:
sudo apt-get install texlive-full
Once you have LaTeX installed, you can then make the report with:
pdflatex report.tex