cpglockd: 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/cpglockd - from package: rgmanager

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

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