neutron-check-nvp-config: 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/neutron-check-nvp-config - from package: neutron-common

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

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