Vim ex commands: m, t and co

:m is an abbreviation for :move, :t and :co are abbreviations for :copy.

Move/copy current line to the end of the buffer:

:m$
:t$

Move the line after two lines below cursor to end of the buffer:

:+2m$

Copy three lines, starting after two lines, to beginning of buffer. Spaces are not required, here included for readabilty:

:+2,+4 t 0

t and m are especially useful with the global (g) command. The following command moves all lines that match pattern to the end of the buffer:

:g/pattern/m$