nano: The Cutbuffer

 
 3.4 The Cutbuffer
 =================
 
 Text can be cut from a file a whole line at a time with ‘^K’.  The cut
 line is stored in the cutbuffer.  Consecutive strokes of ‘^K’ will add
 each cut line to this buffer, but a ‘^K’ after any other keystroke will
 overwrite the entire cutbuffer.
 
    The contents of the cutbuffer can be pasted at the current cursor
 position with ‘^U’.
 
    A line of text can be copied into the cutbuffer (without cutting it)
 with ‘M-6’.