dradio: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/dradio - from package: dradio

You may install the required package with command apt-get install {package}

Error in other languages:
dradio: bevel nie gevind nie
dradio: comandă negăsită
dradio: comando não encontrado
dradio: commande introuvable
dradio: command not found
dradio: käsku ei ole
dradio: không tìm thấy lệnh
dradio: komanda nerasta
dradio: Kommando nicht gefunden.
dradio: kommandot finns inte
dradio: komut yok
dradio: nie znaleziono polecenia
dradio: níor aimsíodh an t-ordú
dradio: no se encontró la orden
dradio: no s'ha trobat l'ordre
dradio: opdracht niet gevonden
dradio: parancs nem található
dradio: perintah tidak ditemukan
dradio: príkaz nenájdený
dradio: příkaz nenalezen
dradio: команда не найдена
dradio: командата не е открита
dradio: 命令找不到
dradio: コマンドが見つかりません