Why any installed software get me an "not found" prompt?

Hello There, i have OpenWRT on my R2 board installed, and when i now want to install some extra software like described here: https://openwrt.org/docs/guide-user/storage/usb-drives this would not work…when i run command: “opkg install gdisk” ord opkg install nano all is good, downloaded and installed successfully, but when in want to run this applications, i get an -ash: gdisk: not found

so - whats wrong? why any programms not working?

Sounds like a PATH-issue…

Can you look where the binaries are located (find) and print your PATH-variable?

find / -name 'nano'
echo $PATH