Linux crossword puzzle part 2

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Across
  1. 2. Unzips files in linux
  2. 4. Returns a set number of lines from the bottom of a text
  3. 7. Reboots the system
  4. 8. Remove selected sections from lines of text
  5. 9. Gives you access to a manual page for all linux commands
  6. 12. Lets you login into a new group
  7. 15. Traces packets back to the network host
  8. 17. Displays current memory usage
  9. 18. Shows how much disk is being used by files
  10. 19. Displays active processes
Down
  1. 1. Kills any processes by name
  2. 3. Sorts the contents of a file
  3. 5. Changes firewall rules
  4. 6. Shows network interface and displays ip address
  5. 10. Zips files in linux
  6. 11. Gives you more information about the OS
  7. 13. Displays or sets date or time on computer
  8. 14. Displays active system and their resource usage
  9. 15. The command to extract and compress files
  10. 16. It captures and analyses network packages