1. Write a command line starting with grep showing the last three lines not containing "/bin/bash" from file /etc/passwd on matrix. You may use pipes in your answer. 2. (2 Marks) Explain how your answer works or explain what you did to solve this problem if your solutions did not work. 3. On matrix rewrite the command line below so errors (lines with "Permission denied") redirect to /dev/null. The rewritten command line shows first ten lines without "Permission denied". find /etc | head 4. (2 Marks) Explain how your answer works or explain what you did to solve this problem if your solutions did not work. 5. On matrix rewrite the command line below so only errors (lines with "Permission denied") are displayed. The rewritten command line shows last ten lines having "Permission denied". find /etc | tail 6. (2 Marks) Explain how your answer works or explain what you did to solve this problem if your solutions did not work. 7. Describe your experience using Ubuntu on your home computer. What issues did you have when