dcopidlng: 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/dcopidlng - from package: kdelibs3-devel

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

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