xprobe2: 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 Debian possible default full paths are:

/usr/bin/xprobe2 - from package: xprobe

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

Error in other languages:
xprobe2: bevel nie gevind nie
xprobe2: comandă negăsită
xprobe2: comando não encontrado
xprobe2: commande introuvable
xprobe2: command not found
xprobe2: käsku ei ole
xprobe2: không tìm thấy lệnh
xprobe2: komanda nerasta
xprobe2: Kommando nicht gefunden.
xprobe2: kommandot finns inte
xprobe2: komut yok
xprobe2: nie znaleziono polecenia
xprobe2: níor aimsíodh an t-ordú
xprobe2: no se encontró la orden
xprobe2: no s'ha trobat l'ordre
xprobe2: opdracht niet gevonden
xprobe2: parancs nem található
xprobe2: perintah tidak ditemukan
xprobe2: príkaz nenájdený
xprobe2: příkaz nenalezen
xprobe2: команда не найдена
xprobe2: командата не е открита
xprobe2: 命令找不到
xprobe2: コマンドが見つかりません