probe: 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/probe - from package: mirmon

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

On Debian possible default full paths are:

/usr/bin/probe - from package: mirmon
/usr/lib/cmtk/bin/probe - from package: cmtk

You may install the required package with command apt-get install {package}

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