Linux basics · part 7 of 8 · Permissions: owner, group, others, rwx, chmod, sudo, root

Why won't Linux let you open this file?

A locked system door slams on Asha when she types cat /etc/shadow. Then notes.txt shows its owner, group and everyone else, each with three doors (read, write, execute) that open or lock as the ls -l code flies to them, before Ravi's private home, a script that needs chmod +x, and sudo's root key. Turn the permission bits and watch every door change.

What you turn: Permission bits

The reel