File ownership - PowerPoint PPT Presentation

Files

Files. Files are central to UNIX Commands System privileges and permission control Device I/O Inter-process communication. File ownership. File Ownership User owner Group owner The group owner is independent of user owner Example: Displaying file ownership “ls –l”

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Essential System Administration, 3rd Edition

University Of Palestine. Essential System Administration, 3rd Edition. Chapter 2 The Unix Way. Ch2. University Of Palestine. Almost every system manager has to deal with user accounts, system startup and shutdown, peripheral devices, system performance, security .

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Changing file permissions – chmod Absolute permissions The security implications Using chmod recursively (-R) Directory

In the last Session… ls -l command seven fields nine permissions of a file ls -ld file ownership file permissions (three-tiered file protection system) changing file permissions - chmod relative permissions. Changing file permissions – chmod Absolute permissions

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