Using Kali Linux.
I right clicked my folder which had a few txt files in it and clicked compress, selected .ZIP and set the password to 'grass'. I ran "fcrackzip -b -l 5-5 -u Testfile.zip". I get no output for a few minutes and then the prompt is back ready for a new command. If I ommit -u it prints a few seemingly random bruteforce attempts with "Possible pw found: " but neither option gives me the password for the zip file. I tried this ith a number of ZIP files made in the same way but with shorter and longer passwords but none have worked, what am I doing wrong?