lnpdll: command not found

Have You tried accessing the binary with the full path?

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/lnpdll - from package: lnpd

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