vbsmooth: 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/lib/voxbo/bin/vbsmooth - from package: voxbo

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

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