dbutil: 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/dbutil - from package: mailavenger

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