macos - Mac os x nano How to copy a row M-6 keys

Question

Mac os x What is the shortcut key to open nano and copy the current line (which can be pasted into Safari)?

nano id_rsa.pub

Press control+k and it cuts, but pasting in Safari doesn't work at all.
There is a button named M-6. Does this M refer to the option key?
But it cannot be copied to Safari at all. In fact, the copy is not successful. How can I copy the current line to the clipped version in nano?

Answer 1

Can I use VIM?

"*YYou can copy the current entire line to the clipboard