elementary_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/elementary_config - from package: libelementary-bin

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

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