med-oncology: 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-oncology - from package: med-oncology

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

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