daa2iso: 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/daa2iso - from package: daa2iso

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

Error in other languages:
daa2iso: bevel nie gevind nie
daa2iso: comandă negăsită
daa2iso: comando não encontrado
daa2iso: commande introuvable
daa2iso: command not found
daa2iso: käsku ei ole
daa2iso: không tìm thấy lệnh
daa2iso: komanda nerasta
daa2iso: Kommando nicht gefunden.
daa2iso: kommandot finns inte
daa2iso: komut yok
daa2iso: nie znaleziono polecenia
daa2iso: níor aimsíodh an t-ordú
daa2iso: no se encontró la orden
daa2iso: no s'ha trobat l'ordre
daa2iso: opdracht niet gevonden
daa2iso: parancs nem található
daa2iso: perintah tidak ditemukan
daa2iso: príkaz nenájdený
daa2iso: příkaz nenalezen
daa2iso: команда не найдена
daa2iso: командата не е открита
daa2iso: 命令找不到
daa2iso: コマンドが見つかりません