dpm-shutdown: 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/sbin/dpm-shutdown - from package: dpm-server-mysql

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

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