SunWorld: Security basics, Part 1 – Understanding file attribute bits and modes

Security is always an issue in multiuser computing systems.
Unix provides a rich set of security options, and this month we
begin a three-part security series by exploring some

“As a true multiuser, multitasking operating system, Unix has a
fairly sophisticated method for setting file and directory

“The chmod command is simple once you’ve grasped the basics. To
understand it, let’s start with a small directory listing that can
be generated by the ls -l command.”

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