: A massive collection of wordlists available on GitHub or pre-installed in /usr/share/seclists/ on Kali Linux.
Testing every possible character combination (requires significantly more time and computing power). Rule-Based Attacks:
You can download the SHA-1 hashes of over 600 million real-world passwords.
The difference between a novice and a professional password cracker is that the novice searches for a bigger wordlist, while the professional builds a smarter attack plan. Now go fix your command line—and leave that error behind.