noblenote: 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/noblenote - from package: noblenote

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

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