BusyBox provides many common UNIX utilities in a single small executable for embedded systems. The community package includes runit; see runit for more information.
Busybox commands are symbolic links to
/usr/bin/busybox and thus take very little space. This is especially interesting for low-footprint systems.
Init scripts can be used together with busybox-init, for example minirc-gitAUR. See init for details.
The gettys are defined in the file
/etc/inittab. By default, getty is started on ttys 1 through 4.
In order to enable/disable gettys, you just put this line in
tty2::respawn:/sbin/agetty -8 -s 38400 tty2 linux
Just replace tty2 with the tty you want getty to start on.
If you want init to ask you before starting the gettty, then replace