> For the complete documentation index, see [llms.txt](https://notes.d15r.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://notes.d15r.de/dev/linux/bash.md).

# Bash

## Links

* [Bash scripting cheatsheet](https://devhints.io/bash)
* [DevOps Bash Tools](https://github.com/HariSekhon/DevOps-Bash-tools)
* [Bash script tutorial](https://www.devopsroles.com/bash-script/)
* [critic.sh](https://github.com/Checksum/critic.sh) - Dead simple testing framework for Bash with coverage.
* [The Linux Command Handbook](https://www.freecodecamp.org/news/the-linux-commands-handbook/)
* [Advanced Bash-Scripting Guide](https://tldp.org/LDP/abs/html/)
* [How to Use Bash Alias](https://www.shell-tips.com/bash/alias/)
* [The Complete How To Guide of Bash Functions](https://www.shell-tips.com/bash/functions/)
* [Learning Modern Linux](https://modern-linux.info/) - Handbook for the Cloud Native Practitioner.
* [The 50 Most Popular Linux & Terminal Commands](https://www.youtube.com/watch?v=ZtqBQ68cfJc)
* [The Arch Linux Handbook](https://www.freecodecamp.org/news/how-to-install-arch-linux/)
* [How to Search for Files from the Linux Command Line](https://www.freecodecamp.org/news/how-to-search-for-files-from-the-linux-command-line/)
* [The Front-End Developer's Guide to the Terminal](https://www.joshwcomeau.com/javascript/terminal-for-js-devs)
* [Improve Your Cybersecurity Command Line Skills](https://www.freecodecamp.org/news/improve-you-cybersecurity-command-line-skills-bandit-overthewire-game-walkthrough/)
* [jlevy/the-art-of-command-line](https://github.com/jlevy/the-art-of-command-line)

## Snippets

### Dateien älter als X Tage

Alle .json Dateien, die älter als 7 Tage sind finden

```
find /var/www/share/default/htdocs/agrirouter/mqtt/backup -name "*.json" -type f -mtime +7
```

und löschen

```
find /var/www/share/default/htdocs/agrirouter/mqtt/backup -name "*.json" -type f -mtime +7 -delete
```

[How to Delete Files Older than 30 days in Linux](https://tecadmin.net/delete-files-older-x-days/)

### Symlink

```
ln -s /path/to/file /path/to/symlink
```

```
ln -sf /path/to/file /path/to/symlink
```

### Print Working directory

```
pwd
```

### Change Driectory

```
cd - // Zum letzen Ordner
```

### Speicherplaz

```
du -hs *
```

### Rechte

#### Dateien

* r: lesen
* w: schreiben
* x: ausführen

#### Ordner

* r: lesen
* w: Dateien löschen, erstellen
* x: Ordner öffnen (cd dir)


---

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