1. Write Commands: The command chmod ugo-wr+x file1 changes the permission of file1. How do you use the chmod command in octal notation to have the same result?   2. Device a shell command to search for a file named foo starting from the root directory, please send the output to a file called fooResult and the errors to /dev/null. 3.  What is the command used to limit the default permissions for a new file or a new directory? Please write the command to set the default file permission to -rw-------and default directory permission to drwx--x--x

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