pyragua: 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/pyragua - from package: pyragua

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

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