Linux › Module 3 › Lesson 5
Quiz — Permissions
Quiz on users, groups, chmod, chown, and sudo
Opening
Module 3 Knowledge Check — apply users, bits, and sudo
You mapped UID/GID, read /etc/passwd, set rwx modes, and treated root as a blast radius. These ten APPLY scenarios test defender decisions — not trivia. Think like someone who just got a shell on a box they own.
Knowledge Check
APPLY: A web app "only worked" after someone started it with sudo and left it running. Compromise of the app now means what?
Multiple choice
Knowledge Check
APPLY: You need a teammate to read deploy-notes.txt but not change it, and you must keep writing. Best mode on a file you own?
Multiple choice
Knowledge Check
APPLY: ls -l /etc/shadow shows -rw-r----- root shadow. Why can your unprivileged account not cat it, even though /etc/passwd is readable?
Multiple choice
Knowledge Check
APPLY: find reports a world-writable backup.sh that root's cron runs nightly. Why is that more than a messy permission?
Multiple choice
Knowledge Check
APPLY: id shows uid=1000(dev) gid=1000(dev) groups=1000(dev),33(www-data). The site's config is 640 root:www-data. Can dev read it?
Multiple choice
Knowledge Check
APPLY: New files in a shared drop folder keep appearing as -rw-rw-rw-. Which quiet setting should you inspect first?
Multiple choice
Knowledge Check
APPLY: True or False: sudo -i is safer than daily GUI browsing as root because it still logs, but leaving that root shell open all afternoon still expands blast radius.
True or False
Knowledge Check
APPLY: Which two are PoLP-aligned Linux permission moves? (Select 2)
Select all that apply
Knowledge Check
APPLY: A junior admin edits /etc/sudoers in gedit, saves a typo, and sudo now says syntax error. What tool would have reduced this risk?
Multiple choice
Knowledge Check
APPLY: True or False: chmod 755 on a script you own typically lets others execute it if they can reach the path, but not overwrite it.
True or False
Answer all 10 knowledge checks to continue. (0/10 answered)