turpial: 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/turpial - from package: turpial

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