> For the complete documentation index, see [llms.txt](https://paul-gleason.gitbook.io/sec-335-eth.-hacking-and-pen.-testing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://paul-gleason.gitbook.io/sec-335-eth.-hacking-and-pen.-testing/tools-recon/john-the-ripper.md).

# John the Ripper

### Usage:

How this works is unshadow uses the password and shadow file to create a file that is usable for john the ripper to work with.

```bash
sudo /usr/sbin/unshadow <etc password file> <etc shadow file> > crack.password.db
john --wordlist=<wordlist location> crack.password.db
```