mpdlistjobs: 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/mpdlistjobs - from package: mpich2

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

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