drbl-run-parts: command not found

Have You tried accessing the binary with the full path?

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/drbl-run-parts - from package: drbl

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