geteltorito: 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/geteltorito - from package: genisoimage

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