Permissions

Root and Sudo

• sudo - “substitute user and do”
• su - “switch user”

Elevated User Groups

In the RHEL OS family, the sudo-enabled user group is called "wheel". In Ubuntu, it's "sudo".

• example: usermod -aG sudo <USER>

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Users & Permissions

• chown - change user / group ownership
  • example: chown <USER> file.txt
• chmod - change user / group permissions (mode)
  • example: chmod 644 file.txt