Part I: Answer the following questions

1. Tell the differences between Kernel, API and Shell.

2. What are the two philosophies ofUNIX?

3. Show two examples of the commandsusing pipe and explain how the pipe works in them separately?

4. In a Linux system, you can issue the command ls/ to check the sub-directories under root. Please describe the meanings of directory /bin, /dev, /boot, /usr, /etc, /mnt, /sbin,/var separately.For example, you can say that /bincontains binary executable files.

5. What does GNU stand for? What is the GNU project? Which organization funded the development of GNU project?

6. Redhat and Ubuntu are both Linux systems. Please list at least five differences between Redhat and Ubuntu.