dh_installzopeinstance: 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/dh_installzopeinstance - from package: zope-debhelper

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

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