med-statistics: 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-statistics - from package: med-statistics

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

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