exploder: 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 CentOS possible default full paths are:

/usr/bin/exploder - from package: wesnoth-tools

You may install the required package with command yum install {package}

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