crack something between 6 and 10 characters with lowercase and numbers

[royalrussian92]

Hi.
What you want is "-1 ?l?d" for a custom charset of lowercase and digits.
Then you can simply use this mask (10chars): ?1?1?1?1?1?1?1?1?1?1
with these additional parameters: "-i --increment-min=8"
This will enable increment mode = when one length is exhausted it's automatically switching to length+1.
And it'll start the increment mode at length 8.
Why 8, when you wanted to start at 6?!
Well, WPA2 passwords have a minimum length of 8.
Lengths of 6-7 are not possible.

thank you for that answer. 
i learned something, and i will try again