dvd-menu: command not found

Have You tried accessing the binary with the full path?

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/dvd-menu - from package: dvd-slideshow

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