docs: add guides for micro, jdupes, and terminal shell tools

Author: shadil-rayyan

docs/Development/editors/micro.md

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+
+
+## What is `micro`?
+
+* **Terminal-Based Editor**: Runs inside the terminal, similar to `nano` or `vim`.
+* **Modern Features**:
+
+  * Syntax highlighting for many programming languages.
+  * Mouse support in the terminal.
+  * Undo/redo system.
+  * Plugin support for extending functionality.
+  * True Unicode support.
+  * Multiple cursors and selection.
+* **No Configuration Required**: Works out-of-the-box with sensible defaults, unlike `vim` which requires configuration.
+* **Cross-Platform**: Linux, macOS, Windows.
+
+---
+
+## How Micro Differs from Nano
+
+| Feature                 | `micro`                       | `nano`                         |
+| ----------------------- | ----------------------------- | ------------------------------ |
+| **User Interface**      | Modern, clean, supports mouse | Simple, minimal, keyboard only |
+| **Syntax Highlighting** | Yes, supports many languages  | Limited or none by default     |
+| **Plugins**             | Yes, supports extensions      | No                             |
+| **Undo/Redo**           | Multiple undo/redo            | Basic, limited undo only       |
+| **Unicode Support**     | Full                          | Limited                        |
+| **Multiple Cursors**    | Yes                           | No                             |
+| **Mouse Support**       | Yes                           | Limited                        |
+| **Configuration**       | Optional JSON config file     | Minimal, through `.nanorc`     |
+| **Installation Size**   | Slightly larger than nano     | Very lightweight               |
+
+**In short:**
+
+* `nano` is extremely lightweight, very simple, and ideal for quick edits.
+* `micro` adds **modern conveniences** (syntax highlighting, plugins, better undo/redo, mouse support) while keeping the simplicity of `nano`. It’s a good choice for users who want a **“nano but smarter”** editor without jumping to `vim` or `emacs`.
+
+---
+
+## Installation
+
+````markdown
+=== "Ubuntu / Debian"
+
+```bash
+sudo apt update
+sudo apt install micro
+````
+
+=== "Arch / Manjaro"
+
+```bash
+sudo pacman -S micro
+```
+
+=== "Fedora"
+
+```bash
+sudo dnf install micro
+```
+
+=== "openSUSE"
+
+```bash
+sudo zypper install micro
+```
+
+````
+
+---
+
+## Basic Usage
+
+- Open a file:
+
+```bash
+micro filename.txt
+````
+
+* **Common shortcuts** (displayed at the bottom of the screen):
+
+  * `Ctrl+S` → Save
+  * `Ctrl+Q` → Quit
+  * `Ctrl+C` → Copy
+  * `Ctrl+V` → Paste
+  * `Ctrl+Z` → Undo
+  * `Ctrl+Shift+Z` → Redo
+  * `Alt+Arrow` → Move cursor by words
+* Plugins and configurations are stored in:
+
+```text
+~/.config/micro
+```
+
+* Install plugins via:
+
+```bash
+micro -plugin install <plugin-name>
+```
+

docs/Terminal/cli-tool/jdupes.md

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+
+
+## What is `jdupes`?
+
+* **Duplicate Finder**: Scans directories to detect files that are **byte-for-byte identical**.
+* **High Performance**: Optimized for speed and low memory usage; can handle millions of files.
+* **Flexible**: Supports options for listing, deleting, or replacing duplicates with hard links.
+* **Safe**: Provides interactive and batch modes to prevent accidental deletion.
+* **Cross-platform**: Works on Linux, Windows, and macOS.
+
+---
+
+## Installation
+
+````markdown
+=== "Ubuntu / Debian"
+
+```bash
+sudo apt update
+sudo apt install jdupes
+````
+
+=== "Arch / Manjaro"
+
+```bash
+sudo pacman -S jdupes
+```
+
+=== "Fedora"
+
+```bash
+sudo dnf install jdupes
+```
+
+=== "openSUSE"
+
+```bash
+sudo zypper install jdupes
+```
+
+````
+
+> On some distributions, `jdupes` might need to be installed from source or a repository if not available in the default package manager.
+
+---
+
+## How to Use `jdupes`
+
+### 1. Basic Duplicate Scan
+
+```bash
+jdupes /path/to/directory
+````
+
+* Lists all duplicate files in the directory and subdirectories.
+
+### 2. Scan Multiple Directories
+
+```bash
+jdupes /dir1 /dir2 /dir3
+```
+
+* Finds duplicates across multiple paths.
+
+### 3. Recursively Scan
+
+```bash
+jdupes -r /path/to/directory
+```
+
+* `-r` enables recursive scanning of all subdirectories.
+
+### 4. Show Only Duplicates
+
+```bash
+jdupes -1 /path/to/directory
+```
+
+* `-1` prints only files that have duplicates, one per line.
+
+### 5. Delete Duplicates Interactively
+
+```bash
+jdupes -d /path/to/directory
+```
+
+* Prompts you to select which duplicates to keep or delete.
+* **Use with caution**; it will delete files permanently if confirmed.
+
+### 6. Replace Duplicates with Hard Links
+
+```bash
+jdupes -L /path/to/directory
+```
+
+* Deletes duplicates and replaces them with hard links, saving disk space without losing file access.
+
+### 7. Save Output to a File
+
+```bash
+jdupes -r /path/to/directory > duplicates.txt
+```
+
+* Useful for reviewing duplicates before taking action.
+
+### 8. Advanced Options
+
+* `-S` → Show size of duplicate sets.
+* `-A` → Ignore empty files.
+* `-Q` → Quiet mode, minimal output.
+* `--nohidden` → Skip hidden files and directories.
+
+---
+
+### Practical Use Cases
+
+1. **Disk Cleanup**: Identify and remove duplicate media, documents, or backups.
+2. **Backup Optimization**: Avoid storing multiple copies of the same file.
+3. **Automated Scripts**: Integrate into cron jobs to maintain clean directories.
+4. **File System Analysis**: Quickly assess how much space duplicates occupy.
+

docs/Terminal/shell/apt-file.md

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+
+## What is `apt-file`?
+
+* `apt-file` queries the **Debian package database** to locate files contained in packages.
+* Unlike `dpkg -L`, which only works for **installed packages**, `apt-file` can search **all available packages in the repositories**.
+* Helps find:
+
+  * Which package provides a particular executable, library, or config file.
+  * Files in development packages (`-dev`) for compiling software.
+  * Missing headers or libraries when compiling from source.
+
+---
+
+## Installation
+
+````markdown
+=== "Ubuntu / Debian"
+
+```bash
+sudo apt update
+sudo apt install apt-file
+````
+
+=== "Arch / Manjaro"
+
+```bash
+sudo pacman -S apt-file
+```
+
+=== "Fedora"
+
+```bash
+sudo dnf install apt-file
+```
+
+=== "openSUSE"
+
+```bash
+sudo zypper install apt-file
+```
+
+````
+
+After installation, **update the package index**:
+
+```bash
+sudo apt-file update
+````
+
+This downloads the latest database of files in packages from the repositories.
+
+---
+
+## How to Use `apt-file`
+
+### 1. Search for a File Across All Packages
+
+```bash
+apt-file search filename
+```
+
+Example:
+
+```bash
+apt-file search /usr/bin/git
+```
+
+* Lists all packages that provide `/usr/bin/git`.
+
+### 2. List Contents of a Package (Even If Not Installed)
+
+```bash
+apt-file list package_name
+```
+
+Example:
+
+```bash
+apt-file list curl
+```
+
+* Shows all files installed by the `curl` package.
+
+### 3. Update the `apt-file` Database
+
+```bash
+sudo apt-file update
+```
+
+* Must be done periodically to get the latest repository information.
+
+### 4. Search with Wildcards or Patterns
+
+```bash
+apt-file search '*/libssl*.so'
+```
+
+* Useful for locating libraries, headers, or other files using patterns.
+
+### 5. Advanced Usage
+
+* **Search only installed packages**:
+
+```bash
+dpkg -S filename
+```
+
+* **Search for executables in PATH using apt-file**:
+
+```bash
+apt-file search bin/program_name
+```
+
+* **Combine with grep for filtering**:
+
+```bash
+apt-file search program | grep 'bin'
+```
+
+---
+
+### Practical Examples
+
+1. **Finding Development Headers**
+
+```bash
+apt-file search zlib.h
+```
+
+* Tells you which `-dev` package contains `zlib.h` so you can install it for compilation.
+
+2. **Troubleshooting Missing Binaries**
+
+```bash
+apt-file search /usr/bin/htop
+```
+
+* If `htop` isn’t installed, you’ll see which package provides it (`htop` package).
+
+3. **Locating Configuration Files**
+
+```bash
+apt-file search /etc/nginx/nginx.conf
+```
+
+* Shows which package provides the configuration file.
+
+---
+