All linux users out there is there a way to protect from "rm -rf" scenario if your friend knows your linux password

Change your password?

I know that but if I don't wanna change but still protect system, like any way to create an alias?@Fiftyseven

If you're not sharing machines, you could add ip restrictions, or set up/change ssh keys.

Its just my personal laptop@Fiftyseven

Then if nothing could be done then trust is all we got, is it?@Fiftyseven

You could create a new user (with a different password), and revoke the sudo access for the current one.
The simplest way would still be to change your password, is that definitely not an option?

Oh yeah that's definitely an option, thanks for your input@Fiftyseven

If he has physical access nothing can protect you. Boot init=/bin/bash and you're done

Alias the command to simply echo out what they passed in.

It didn't work when i tried@mortanius

In your bash profile you are putting something like:

alias rm="echo" ?

You could install a trash package an alias as that instead, but I don't think that's what you want though you can undo deletes then.

Have your work always in some repository like git, svn etc and then follow 3+2+1 backup rule. This use case is typical disaster management which covers another scenarios say your hard disk fried one day.

Are you sure that you can't just
alias rm -rf='echo eat my shit'
And then . ~/.bashrc or source ~/.bashrc?

I tried to change alias for rm, it didn't work, so I didn't test for rm -rf@RAZERZ

Create a shell script rm.sh which eats the shit thing and accepts all parameters

man chattr

Move the rm binary somewhere else, and put a shell script in it's place. Check if the arguement is /, otherwise point it to the real rm. If it's actually rm -rf /, print out some insults. I don't recommend testing it though.
Good luck.

Nice idea but who will try?😄I guess we can try in vmWare@dhruvitr