luckybackup: 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/luckybackup - from package: luckybackup

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

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