helpers: 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/helpers - from package: orville-write

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

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