proda: command not found

Have You tried accessing the binary with the full path?

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/proda - from package: proda

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