Copy all the lines to clipboard

Is there any way to copy all lines from open file to clipboard in VI editor. I tried yG but it’s not using clipboard to store those lines.

So is it possible?

Use:

:%y+

to yank all lines.

Explanation:

• % to refer the next command to work on all the lines
• y to yank those lines
• + to copy to the system clipboard

NB: In Windows, + and * are equivalent see this answer.