pildriver.py: 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/pildriver.py - from package: python-pil

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

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