pumpa: 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/pumpa - from package: pumpa

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

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