RPM command not found

Hi ,

I am evaluating a Digi im.x8m nano kit.
I read through the hardware design manual and came across power and performance report.

https://www.digi.com/resources/documentation/digidocs/pdfs/90002449.pdf

I went through the instructions to run some tests over the board and it seems i ended up with following error , when tried to install any rpm packages. Is this expected?

-sh: rpm: command not found

please take a look at this page for instructions on adding rpm to your image
https://www.yoctoproject.org/pipermail/yocto/2012-December/011351.html