prads2snort: 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/prads2snort - from package: prads

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

Error in other languages:
prads2snort: bevel nie gevind nie
prads2snort: comandă negăsită
prads2snort: comando não encontrado
prads2snort: commande introuvable
prads2snort: command not found
prads2snort: käsku ei ole
prads2snort: không tìm thấy lệnh
prads2snort: komanda nerasta
prads2snort: Kommando nicht gefunden.
prads2snort: kommandot finns inte
prads2snort: komut yok
prads2snort: nie znaleziono polecenia
prads2snort: níor aimsíodh an t-ordú
prads2snort: no se encontró la orden
prads2snort: no s'ha trobat l'ordre
prads2snort: opdracht niet gevonden
prads2snort: parancs nem található
prads2snort: perintah tidak ditemukan
prads2snort: príkaz nenájdený
prads2snort: příkaz nenalezen
prads2snort: команда не найдена
prads2snort: командата не е открита
prads2snort: 命令找不到
prads2snort: コマンドが見つかりません