zarafa-monitor: 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-monitor - from package: zarafa-monitor

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

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