RB711 2hnd with rc2, after downgrade to 5.21 dhcp packet is missing. How can I add with terminal?

RB711 2hnd with rc2, after downgrade to 5.21 dhcp packet is missing. How can I add with terminal?

you can't actually copy files with terminal, but you can use terminal to fetch files from somewhere.

Or, do it the easy way, just drag the dhcp file into winbox and reboot!