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The user file-creation mode mask [umask] is used to determine the file permission for Normal User and Root User.
Default Value for Folder 777
Default Value for File 666
For Root User Umask value is 022
Type Permission Umask Substract Folder Permission
Folder 777 022 [ 777 – 022 ] 755 rwxr-xr-x
File 666 022 [ 666 – 022 ] 644 rw-r--r--
For Normal User Umask value is 002
Type Permission Umask Substract Folder Permission
Folder 777 002 [ 777 – 002 ] 775 rwxrwxr-x
File 666 002 [ 666 – 002 ] 664 rw-rw-r--
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