med-epi: 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-epi - from package: med-epi

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

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