To discover whether a package we require is included in our configured layers, and what specific versions are supported, we can use bitbake-layers from our build directory as we saw previously:

$ bitbake-layers show-recipes htop
htop:
 meta-oe              1.0.3 

Alternatively, we can also use BitBake as follows:

$ bitbake -s | grep htop
htop                                                :1.0.3-r0  

Or we can use the find Linux command in our sources directory:

$ find /opt/yocto/fsl-community-bsp/sources -type f -name "htop*.bb"
/opt/yocto/fsl-community-bsp/sources/meta-openembedded/meta-oe/recipes-support/htop/htop_1.0.3.bb  

Once we know what packages we want to include in our final images, let's see how we can add them to the image.