Crunch - Using the Charset.lst File

Crunch’s Charset.lst file contains a list of keywords that are pre-defined as alphanumeric or symbol strings. We can use these keywords so we don’t have to manually type in the characters that we want to use. The file is located in the “/usr/share/crunch” directory. If we view the file, we can see what keyword sets are available:

➢      cd /usr/share/crunch

➢      cat charset.lst

We can use any of the defined sets, for example:

➢      sudo crunch 2 4 -f charset.lst mixalpha-numeric-all -o mixedall.txt

This command creates a wordlist that cycles through two-to-four-character words that contains all letters, numbers and symbols. Most websites are requiring new accounts to use at least letter and number combinations. So having wordlists with these combinations are a good start.

It is also very common to have strings of numbers in passwords. I have seen them...