mpdscribble: command not found

Have You tried accessing the binary with the full path?

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/mpdscribble - from package: mpdscribble

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