I'll have to take time to read it properly I guess, I clearly don't know how it's supposed to be used:

```
[user@TheDesktop Programming]$ ipfs cid format -b b58mh k51qzi5uqu5dlzjf07qr5sjvr8g1zisqfbhb4y5pg0iuo8herko7ah7731uehz 
Error: Unsupported multibase encoding: b58mh
```