mdpress: 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/mdpress - from package: mdpress

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

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