dcopserver_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/bin/dcopserver_shutdown - from package: kdelibs3

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

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