ffado-debug: command not found

Have You tried accessing the binary with the full path?

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/ffado-debug - from package: libffado2

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