prism2_param: 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/sbin/prism2_param - from package: hostap-utils

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

Error in other languages:
prism2_param: bevel nie gevind nie
prism2_param: comandă negăsită
prism2_param: comando não encontrado
prism2_param: commande introuvable
prism2_param: command not found
prism2_param: käsku ei ole
prism2_param: không tìm thấy lệnh
prism2_param: komanda nerasta
prism2_param: Kommando nicht gefunden.
prism2_param: kommandot finns inte
prism2_param: komut yok
prism2_param: nie znaleziono polecenia
prism2_param: níor aimsíodh an t-ordú
prism2_param: no se encontró la orden
prism2_param: no s'ha trobat l'ordre
prism2_param: opdracht niet gevonden
prism2_param: parancs nem található
prism2_param: perintah tidak ditemukan
prism2_param: príkaz nenájdený
prism2_param: příkaz nenalezen
prism2_param: команда не найдена
prism2_param: командата не е открита
prism2_param: 命令找不到
prism2_param: コマンドが見つかりません