pump: 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/pump - from package: distcc

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

On Debian possible default full paths are:

/sbin/pump - from package: pump

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

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