pyNeighborhood: 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/pyNeighborhood - from package: pyneighborhood

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

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