lbt: 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/lbt - from package: lbt

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

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