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Write permission allows the users to create a new file in the directory, and remove a file or directory from it. In case the file is a directory, read permission allows the user to list the contents of the directory. And execute permission allows the user to run the file as a program.
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Write permission allows the user to modify the contents of the file. In case the file is an ordinary file, read permission allows the user to open the file and examine its contents. #4) The final three characters indicate public permissions, similar to the user permissions above. #3) The next three characters indicate group permissions, similar to the user permissions above.