oh yeah, thought of another fun one:
there was some mention of .bash_history stuff earlier, and getting your commands redacted. What if you just... wanna disable .bash_history altogether?unset HISTFILE HISTSIZE HISTFILESIZE
usually gets the job done.
also, there are a surprising number of people who do not know about attrib and chattr commands. chattr +i [filename]
is a fun, but stupid way to keep someone from deleting a file. Like say, a persistence mechanism. Fun for those who have no idea how extended attributes work.