build-openstack-debian-image: 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/sbin/build-openstack-debian-image - from package: openstack-debian-images

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

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