openstack-doc-test: 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/openstack-doc-test - from package: python-openstack-doc-tools

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

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