Here is the tip to copy contents from one file to another.

1. Press ‘ESC’.
2. Press Shift+” (double quote).
3. Press ‘a’.
4. Press number of lines you want to copy.
5. Press y followed by another y (yy).
6. Now press : (COLON) to get the vi prompt.
7. Hit e “destination file name’
8. Once you enter the destination file, go to the line where you want the copied lines to be inserted.
9. Press ‘ESC’.
10. Press Shift+”(double quote).
11. Press ‘a’.
12  Press ‘p’.

Happy editing