You think your Linux server stays hidden because it lacks a public website, but...
https://victor-wiki.win/index.php/How_a_Simple_Query_Connects_the_Dots:_OSINT,_Indexing,_and_Your_Exposure
You think your Linux server stays hidden because it lacks a public website, but attackers scan the entire internet 24/7. They find your exposed SSH ports and leaked credentials on data brokers in seconds