Fill in the blanks

1. By default, _______ deletes the ASCII file it compresses.

2. The zcat utility is identical to using the ______ command.

3. A(n) ________ is the part of a computer operating system that understands and executes commands entered by a human being or from a program.

4._______ are strings that contain information such as drives, paths, or filenames.

5. A(n) _______ is a variable that has a specific value for the operating system.

6. The default shell for CentOS 7 is _________.