我可以假设安装了bash

I have a cross platform product that gets deployed to several Linux distros and I'm busy changing one of its startup scripts. Currently the script uses /bin/sh as interpreter. My question is. How safe am I if I change this to /bin/bash, will there be some cases that bash is not installed or something. Why does all the scripts in /etc/init.d use /bin/sh. Are there some stuff that will break when using bash?I have a cross platform product that gets deplo