Juicy Extensions

ext:log | ext:txt | ext:conf | ext:cnf | ext:ini | ext:env | ext:sh | ext:bak | ext:backup | ext:swp | ext:old | ext:~ | ext:git | ext:svn | ext:htpasswd | ext:htaccess site:example[.]com

A all list of useful dorks:

https://taksec.github.io/google-dorks-bug-bounty/