How to write a shell script in linux

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To know more about what a shell is, click here. We all use the built in terminal window in Linux distributions like Ubuntu, Fedora, etc. But how do they actually work? All Linux operating systems have a terminal window to write in commands. But how are they executed properly after they are entered? Also, how are extra features like keeping the history of commands and showing help handled?
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Creating basic shell scripts

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Tutorial - Write a Shell in C • Stephen Brennan

Implementing it yourself is a fun way to show that you have what it takes to be a real programmer. So, this is a walkthrough on how I wrote my own simplistic Unix shell in C, in the hopes that it makes other people feel that way too. The code for the shell described here, dubbed lsh , is available on GitHub. University students beware! Many classes have assignments that ask you to write a shell, and some faculty are aware of this tutorial and code.
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Tutorial - Write a Shell in C

If you are using any major operating system you are indirectly interacting to shell. If you are running Ubuntu, Linux Mint or any other Linux distribution, you are interacting to shell every time you use terminal. It is often mistaken that Linus Torvalds has developed Linux OS, but actually he is only responsible for development of Linux kernel.
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To create this article, 27 people, some anonymous, worked to edit and improve it over time. The wikiHow Tech Team also followed the article's instructions and verified that they work. This article has been viewed , times.
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