zarafa-spooler: 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/zarafa-spooler - from package: zarafa-spooler

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

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