My practice attempt to decrypt a SHA-256 hash of an IP address

My practice attempt to decrypt a SHA-256 hash of an IP address.  Has anyone here tried this?

   https://github.com/djangofan/hashcat-crack-ip


I generated the SHA-256 hashed IP from this website:  https://passwordsgenerator.net/sha256-hash-generator/

I made 2 scripts (in the above Github repo):
   1.  crackit.sh :  -a 1 left right
   2.  crackitBruteForce.sh :  -a 3 ?d?d?d.?d?d?d.?d?d?d.?d?d?d

Am I doing this right?  The process only seems to be using 1 CPU on the brute force attack.  How do I get it to consume more CPU cores?

-Jon