xmedcon-config: 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/xmedcon-config - from package: libmdc2-dev

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

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