Which command is used to make a shell variable known to subsequently executed programs?

Which of the following commands increases the number of elements in a directory? (Choose two)

Which of the following is an example of globbing?

Which of the following commands will output a list of all of the file names, under your home directory and all subdirectories, which have file names ending with .pdf?

Which of the following is a valid option for a typical command to get its built-in usage information?

Which of the following services are used for network file systems? (Choose two)

Which one of the following is true about Open Source software?

Which of the following statements is true for a Linux distribution used in an enterprise environment?

Which of the following is a Linux based operating system for use on mobile devices?

Which statements are true about virtualization? (Choose two)