dh_auto_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/dh_auto_test - from package: debhelper

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

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