jackdaemon: 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

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/jackdaemon - from package: autoradio

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