scrobble-server: 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/scrobble-server - from package: libghc-scrobble-dev

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

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