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3. File permissions

Each file has a set of permissions that control the kinds of access that users have to that file. The permissions for a file are also called its access mode. They can be represented either in symbolic form or as an octal number.

3.1 Structure of File Permissions  Structure of file permissions.
3.2 Symbolic Modes  Mnemonic permissions representation.
3.3 Numeric Modes  Permissions as octal numbers.


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