I'm verry new to jack the ripper and I'm wondering how to use special rules for cracking a txt file. The password of my txt file is 123 and with the single crack mode it takes a lot of time to crack this simple password. I searched for
file and replaced the maximal length with 3 (in [Incremental:Digits]). When I safe the file and try to crack the password again, it still doesn't peforme much faster. Can somebody explain me, how to crack such simle passwords in a reasonable time? I crack the password by typing
sudo john --incremental:Digits example.txt
in the bash. Also I operate on Linux Ubuntu. Thanks for your help.