pyrit: 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/pyrit - from package: pyrit

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

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