vdaaerl: 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/vdaaerl - from package: vpb-utils

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

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