For migration purposes i need to get the plaintext password for all our accounts, stored in the shadow file.
Our system uses usernames in the format "
firstname.lastname" and password is either "
firstname + single_number + single_letter" or "
lastname + single_number + single_letter", like "
firstname3p" or "
What is the correct way to use filters to extract firstname or lastname and try every combination of number + letter on them?