"chmod 777" is one of the most dangerous commands in Linux.

Most beginners don't know why.

Linux permissions are just math:

4 = read 2 = write 1 = execute

Add them up: 7 = full access (4+2+1) 6 = read + write 5 = read + execute 4 = read only

Three digits, three audiences: Owner. Group. Everyone else.

So "chmod 777 config.txt" means anyone on that system can read it, edit it, and execute it.

That's not a config choice. That's a privilege escalation invitation.

Auditors flag it. Attackers hunt for it. SOC analysts see it weekly.

Learn more here 👇