mpDris2: 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/mpDris2 - from package: mpdris2

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

Error in other languages:
mpDris2: bevel nie gevind nie
mpDris2: comandă negăsită
mpDris2: comando não encontrado
mpDris2: commande introuvable
mpDris2: command not found
mpDris2: käsku ei ole
mpDris2: không tìm thấy lệnh
mpDris2: komanda nerasta
mpDris2: Kommando nicht gefunden.
mpDris2: kommandot finns inte
mpDris2: komut yok
mpDris2: nie znaleziono polecenia
mpDris2: níor aimsíodh an t-ordú
mpDris2: no se encontró la orden
mpDris2: no s'ha trobat l'ordre
mpDris2: opdracht niet gevonden
mpDris2: parancs nem található
mpDris2: perintah tidak ditemukan
mpDris2: príkaz nenájdený
mpDris2: příkaz nenalezen
mpDris2: команда не найдена
mpDris2: командата не е открита
mpDris2: 命令找不到
mpDris2: コマンドが見つかりません