Working on zeus 3.0.4, for aarch64

I  have a startup script making use of “service” How do I properly configure in support for the “service” command ?

I do not have an error when working under rocko.

The error seen is :    /etc/rc5.d/S15mountnfs.sh: line 70: service: command not found

Usage: @ line 70:  “service rpcbind status >/dev/null”

Thanks,

Steve