simpleburn.sh: 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/simpleburn.sh - from package: simpleburn

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

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