vpbecho: 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/vpbecho - from package: vpb-utils

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