auplay: 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 CentOS possible default full paths are:

/usr/bin/auplay - from package: nas

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/auplay - from package: nas-bin

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

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