40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
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---
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title: Shell scripting
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---
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# Shell scripting
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In the command line, a shell script is an executable file that contains a set
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of instructions that the shell will execute. It's main purpose its to reduce
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a set of instructions (or commands) in just one file. Also it can handle
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some logic because it's a programming language.
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## How to create it
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1) Create the file:
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```bash
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$ touch myscript.sh
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```
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2) Add a [shebang](https://en.wikipedia.org/wiki/Shebang_(Unix)) at the start of the file. The Shebang line is responsible for letting the command interpreter know which interpreter the shell script will be run with:
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```bash
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$ echo "#!/bin/bash" > myscript.sh
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# or
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$ your-desired-editor myscript.sh
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# write at the first line #!/bin/bash
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```
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3) Add some comands:
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```bash
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$ echo "echo Hello World!" >> myscript.sh
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```
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4) Give the file _execution_ mode:
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```bash
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$ chmod +x myscript.sh
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```
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5) Execute it!
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```bash
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$ ./myscript.sh
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Hello World!
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```
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More info about shell-scripting can be found [here](https://www.shellscript.sh/)
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