vim demo - moving and deleting lines

Question 1:
Open the file test.txt and move line 9 to line 5.

Answer:

vi test.txt

Switch to line mode and go to line 9:

:9

press Enter – you are on line 9. Cut this line – press:

dd

Switch to line mode again and go to line 5:

:5

Press Enter – you are on line 5. To paste cutted line to line 5 press Shift+P – paste above this line, so the current line becomes line 6 and pasted line – becomes line 5.
Save and quit from line mode:

:wq!

And press Enter

Question 2:
Open file test.txt again and delete first 3 lines.

Answer:

vi test.txt

there is a possibility that you’ll be on line 5 – per previous operation. Press:

gg

to get to the line 1.
Press:

d3d

to delete first 3 lines.
Save and quit from line mode:

:wq!

And press Enter