JtR_cheatsheet.md updated

JtR_cheatsheet.md

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+```markdown
+# John the Ripper Cheatsheet
+
+John the Ripper, often called "John," is an open-source and highly flexible password-cracking tool. It supports multiple algorithms and is available on both Windows and Linux.
+
+## Table of Contents
+- [Dictionary Attacks](#dictionary-attacks)
+- [Brute Force Attacks](#brute-force-attacks)
+- [Tips & Additional Commands](#tips--additional-commands)
+
+---
+
+## Dictionary Attacks
+
+### Basic Dictionary Attack
+
+```bash
+john --wordlist=dictionary.txt hashfile
+```
+
+- **wordlist**: This option specifies the dictionary file you'd like to use.
+
+**Example:**
+
+```bash
+john --wordlist=passwords.txt hashes.txt
+```
+
+### With Rules
+
+```bash
+john --wordlist=dictionary.txt --rules hashfile
+```
+
+- **-rules**: This enables John's wordlist rules. You can also specify your own rules.
+
+**Example:**
+
+```bash
+john --wordlist=words.txt --rules=best64.rule hashes.txt
+```
+
+---
+
+## Brute Force Attacks
+
+### Basic Brute Force
+
+```bash
+john --incremental hashfile
+```
+
+**Example:**
+
+```bash
+john --incremental hashes.txt
+```
+
+### Specify Charset
+
+```bash
+john --incremental=Digits hashfile
+```
+
+- Here, you can define custom charsets like `Digits`, `Alpha`, `AlphaNum`, etc.
+
+### Brute Force with Custom Charset
+
+```bash
+john --incremental=Custom --mask='?a?a?a?a' hashfile
+```
+
+**Example:**
+
+```bash
+john --incremental=Custom --mask='?a?a?a?a?a' hashes.txt
+```
+
+---
+
+## Tips & Additional Commands
+
+- **Resume Cracking**: Use `john --restore` to resume cracking.
+- **Show Cracked Passwords**: Run `john --show hashfile` to display cracked passwords.
+- **List Supported Formats**: Use `john --list=formats` to see all supported hash formats.
+- **Performance Tuning**: Use `-fork=N` to distribute the task over multiple processes.
+- **Verbose Mode**: Add `vv` for a detailed output.
+- **GPU Acceleration**: Versions like John the Ripper Pro support GPU acceleration with `-device=opencl`.
+- **Manual Page**: Check `man john` for a complete list of options.
+
+---
+
+Feel free to reach out for any additions or modifications.
+```
+
+You can save this content into a `.md` file, such as `john-the-ripper-cheatsheet.md`, and then upload it to GitHub. The Markdown will format the text and make it look organized and easily readable.