med-imaging: 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-imaging - from package: med-imaging

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

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