Allintext Username File Type Log Extra Quality -

allintext:username filetype:log

: Instructs Google to find pages where the word "username" appears in the body text of the document. allintext username file type log

This operator instructs Google to only return pages where all of the specified keywords (in this case, "username") appear in the body text of the document. allintext username file type log

To understand the feature, one must break down the two operators used in conjunction: allintext username file type log

Finding a .log file with usernames is a precursor to an Account Enumeration Attack . Even if passwords are not listed, knowing which usernames exist allows an attacker to skip the "guessing usernames" phase and move straight to cracking passwords.