Added Shell-Scripts.md

LLM-Instructions.md

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+# Results as raw Markdown
+
+## Tildes (~~~) (very high reliability)
+
+"Provide your results as raw Markdown. Wrap the entire output inside a triple-tilde (~~~) code block. Do not use backticks for the outer wrapper."
+
+## 4 Backticks (high reliability)
+
+"Please provide your results again as raw Markdown. Wrap the entire response in a fenced code block using four backticks (````) so that the internal triple-backtick code blocks do not break the formatting."
+
+## Not good
+
+"Please provide your results again as raw Markdown in a fenced code block."
+
+Only works with Gemini; Perplexity and ChatGPT fail at the first source code block.
+
+

Shell-Scripts.md

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+# Insert line(s) at certain position in existing file
+
+## Motivation
+
+A Debian 12 Linux bash shell script is needed which inserts line(s) of text at a certain position in an existing file. The position is defined by text of the existing file.
+
+## Task
+
+Generate an example shell script and explain in detail what it is doing.