43 related command entries are available in Commands.
Users and Permissions
Accounts, groups, ownership, access control, and elevation.
Users and Permissions
Users and Permissions
Use Users and Permissions when you need identity, ownership, and permission changes to make sense before you touch access or elevation.
This domain is public-ready across Learning, Practice, Troubleshooting, and Reference.
What you will learn
- Understand the difference between identity, ownership, and permission bits
- Read and change access carefully instead of guessing
- Know when to inspect first, when to elevate, and when to stop
Coverage in this domain
Best when you are solving real access problems and need to know what is safe to change.
Lesson order
Start at the top and move forward if you want the full learning path for this domain.
Lesson 1 Permissions
Who Owns What: Users and Groups Understand how users, groups, and administrator-level accounts divide access so one machine can be used safely by different people and processes. Lesson 2 Permissions
Users and Groups: GUI Inspect user accounts and group membership through graphical tools, and understand where GUI management is convenient versus limited. Lesson 3 Permissions
Users and Groups: CLI Inspect identities, groups, and local accounts from the command line, starting with safe read-first commands before making account changes. Lesson 4 Permissions
Permissions: NTFS and Linux rwx Understand the basic permission models in Linux and Windows, and make small, safe permission changes without treating access control like magic. Lesson 5 Permissions
Elevation: UAC and sudo Understand temporary privilege elevation in Windows and Linux so you can perform administrative work deliberately instead of staying permanently over-privileged. Lesson 6 Permissions
Permissions Lab: Diagnose and Fix Use a safe practice folder to inspect, break, diagnose, and restore access so permission troubleshooting feels systematic instead of scary. Practice this domain IDENTITY & ACCESS MANAGEMENT (IAM) SESSION & USER ENVIRONMENT
Understanding Users & Identity
Understand how Linux translates human usernames into kernel UIDs and GIDs, and explore the central registry files.
User & Group Management Creating and Modifying UsersMaster the command-line tools for spawning new users, defining their environment, and modifying their attributes.
User & Group Management The Almighty SudoUnderstand delegation of privilege, how the sudo command works structurally, and how to safely edit the sudoers file to grant granular powers.
User & Group Management Group Dynamics & File ModesUnderstand how groups function as the connective tissue between users, enabling secure team collaboration and shared access.
User & Group Management35 related command entries are available in Commands.
Fix related problems
Access Denied on a File or Folder
Use this when a user cannot open, edit, or enter a file or directory they are expected to access.
Files and Storage Cannot Sign In to a User AccountUse this when a user cannot sign in and you need to separate password, account state, profile, and policy causes.
Users and Permissions Sudo or Admin Prompt Keeps FailingUse this when elevation fails and you need to separate wrong identity, missing rights, policy, and prompt-context problems.
Users and Permissions Reference quick access
Change File Permissions Correctly
Fix access on a file or folder by checking ownership, current permissions, and the real user path before changing anything.
Task guide Create a User Account SafelyAdd a user without over-granting privileges, then verify the account behaves the way you intended.
Task guide Users, Groups, and Permissions MatrixSee identity, ownership, permission bits, and elevation as a permission system instead of a pile of commands.
Matrix Permission Inheritance and Access Decision MapSee how ownership, group rules, inheritance, and explicit permissions combine into the final access result.
Flow map