Introduction

User Accounts

• Linux creates a regular user with sudo or requires a root password.
• Administrative tasks run as root, directly or via sudo.
• Single-user systems may need one account.
• Multi-user systems should use separate accounts.

Advantages of Separate Accounts

• Private home directories for security.
• Selective sudo access with logging.
• Flexible group-based permissions.

Groups & User Management

• Some systems auto-create a User Private Group (UPG).
• UPG: group name = username; only that user is a member.
• Without UPG, users get the users group as primary.
• Users must belong to at least one group.
• Shared groups support collaboration.

Best Practice

• Create groups first, then users.
• Creating users first requires extra changes later.