rplayd: 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/sbin/rplayd - from package: rplay-server

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

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