enlightenment_start: 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/enlightenment_start - from package: e17

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

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