lpd: 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/lpd - from package: lprng
/usr/sbin/lpd - from package: lpr

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

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