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If the umask value is 002 for a user, the directory created will have the permission of 775 & files created will have 664, that is we subtract the umask value 002 from 777 for directories & from 666 for files.

Why 777 for directory & 666 for files?

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up vote 1 down vote accepted

Directories must have execute permissions if they are to be traversed. Arbitrary files should not have execute permissions for security reasons.

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