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UNIX in a Nutshell: System V Edition

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The Bourne Shell and Korn Shell
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umask



umask

 [

nnn

]

Display file creation mask or set file creation mask to octal value nnn . The file creation mask determines which permission bits are turned off (e.g., umask 002 produces rw-rw-r-- ). umask is also a UNIX command (see Section 2).


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