sound.py: 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/share/games/oneisenough/bin/sound.py - from package: oneisenough

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

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