Ubuntu 12.04: proper way to enable non-auto dhcp interface

[Tom H]

On Tue, Jul 16, 2013 at 12:14 PM, Tero M <termant at gmail.com> wrote:
>
> in my /etc/network/interfaces file has dhcp interface set like this
>
>     #auto eth1
>     iface eth1 inet dhcp
>
> If I don't want this interface be enabled automatically at startup (as
> it has been configured without auto statement) how do I enable it in
> command line?

ifup eth1