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The sticky bit 2.1.3.2. The setuid bit 2.1.3.3. The setgid bit 2.1.4. See Also 2.2. Understanding the Windows Access Control Model 2.2.1. Problem 2.2.2. Solution 2.2.3. Discussion 2.3. Determining Whether a User Has Access to a File on Unix 2.3.1.