med-psychology: 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/med-psychology - from package: med-psychology

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

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