exifprobe: 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/exifprobe - from package: exifprobe

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

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