opendkim-atpszone: 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/opendkim-atpszone - from package: opendkim-tools

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

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