mk_vtsm: 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/mk_vtsm - from package: dvdwizard

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

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