dvdtape: 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/dvdtape - from package: dvdtape

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

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