drbl-aoe-img-dump: 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

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/sbin/drbl-aoe-img-dump - from package: drbl

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