djcelerymon: command not found

Have You tried accessing the binary with the full path?

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/djcelerymon - from package: django-celery

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