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Step 3 Test File Creation Mask

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umask (user mask) is a command and a function in POSIX environments. It sets the file mode creation mask of the current process, which limits the permission modes for files and directories created by the process. A process may change the file mode creation mask with umask, and the new value is inherited by child processes. When a shell (as with an output redirect) or other program creates a file or directory, it may specify permissions to be granted, however, permissions which the file mode creation mask does not allow are removed.

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The default setting is 022. With this setting CMSMS will create folders with the permission 755 and files with the permission 644.