Users & Groups
How Linux models identity — UID/GID, /etc/passwd, /etc/shadow, primary vs supplementary groups, sudo, and user management commands.
Jan 20, 2026
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Users
2 articles
Permissions & User Commands
chmod, chown, useradd, usermod, sudo, and the everyday commands for managing file permissions, ownership, and user accounts.
Jan 20, 2026
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