pull-lp-source: 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/pull-lp-source - from package: ubuntu-dev-tools

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

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