medcon: command not found

Have You tried accessing the binary with the full path?

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/medcon - from package: medcon

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