Change default shell to bash

I want to change default ssh shell. How Can i do it?
I’ve installed Bash via opkg
But /etc/passwd is read only.
Thanks for your help

Have you ever managed to solve this mistery?

Apologies if poor etiquette to bump an old thread here, but this came up in a google search. The answer is to put the shell you want in /storage/.profile

e.g. create a .profile file containing