vbackup-wizard: 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/vbackup-wizard - from package: vbackup

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

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