discover-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/discover-config - from package: discover

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

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