simpleburn: 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/simpleburn - from package: simpleburn

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