I've a Synology DS412+ NAS box running Busybox, which has a default shell of ash. Previously, ipkg install optware-devel was run and it installed bash and set it as the default shell. Running ipkg install zsh has installed zsh but not set it as the default shell. chsh is not present (Busybox assumes a cut down system and only ash will be used), so how do I set the default shell?
I'd be very grateful for any help or insight .