texlive-runtexshebang Subpackage of texlive-base

In short, a TeX-style shebang (%#!) is a special kind of TeX comment that you include in your TeX/LaTeX document file to tell the operating system's shell how to run the file for the rest of the file: %#!lualatex foo.tex \documentclass{article} \begin{document} Hello, {\LaTeX} World! Happy {\TeX}ing. \end{document} If you are using a TeX-style shebang, it must appear on the line that matched 20 lines or less in your LaTeX document, and it has to start with a TeX comment symbol (%) followed by a hash sign (#) and an exclamation mark (!), colloquially known as the bang, hence the name shebang for TeX/LaTeX.

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