Copy/Paste w/ Emacs

From this stackoverflow answer you must:

• Set a mark at the beginning of what you'd like to copy
• Move cursor to the end of what you'd like copied
• copy
• yank (paste)

C-SPACE(to set, move cursor to end and:) M-w C-y

• C-SPACE: set mark
• M-w: copy
• C-y: yank

So to copy/paste a line (the example in the stackoverflow answer) you'd start with C-a to move to the beginning of the line and C-n to move cursor no the next line.