normalize-ogg: 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/normalize-ogg - from package: normalize-audio

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

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