piespy: 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/piespy - from package: piespy

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

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