aubionotes: 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/aubionotes - from package: aubio-tools

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

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