dh_acc: 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_acc - from package: dh-acc

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

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