Watch the kernel check if you're allowed.
In this interactive Linux lesson from Stencel Academy you don't just read — you type real commands like cat secret.txt, chmod +r secret.txt, ./deploy.sh, chmod +x deploy.sh and watch the machine respond on a live, animated map. It is part of the free How Linux Works course.
Builds on: Reading & Writing.
ls -l secret.txt — Read the permission bits directly.chmod 600 secret.txt — Octal sets the same bits: 6 = rw-. On root's file, this locks YOU out again.whoami — You're 'other' for a root-owned file.chmod 755 deploy.sh — The classic script mode: rwx for you, r-x for everyone else.bash deploy.sh — Running via the interpreter needs only READ — a common workaround, worth understanding.