ploop-balloon: 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/ploop-balloon - from package: ploop

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

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