med-rehabilitation: 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-rehabilitation - from package: med-rehabilitation

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

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