File: coreutils.info,  Node: File permissions,  Next: File timestamps,  Prev: Numeric operations,  Up: Top

27 File permissions
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Each file has a set of “file mode bits” that control the kinds of access
that users have to that file.  They can be represented either in
symbolic form or as an octal number.

* Menu:

* Mode Structure::              Structure of file mode bits.
* Symbolic Modes::              Mnemonic representation of file mode bits.
* Numeric Modes::               File mode bits as octal numbers.
* Operator Numeric Modes::      ANDing, ORing, and setting modes octally.
* Directory Setuid and Setgid:: Set-user-ID and set-group-ID on directories.