openstack-purge: 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/openstack-purge - from package: openstack-deploy

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

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