piuparts: 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/piuparts - from package: piuparts

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

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