dh-dzil-refresh: 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-dzil-refresh - from package: dh-dist-zilla

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

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