pdl2: 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/pdl2 - from package: pdl

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

Error in other languages:
pdl2: bevel nie gevind nie
pdl2: comandă negăsită
pdl2: comando não encontrado
pdl2: commande introuvable
pdl2: command not found
pdl2: käsku ei ole
pdl2: không tìm thấy lệnh
pdl2: komanda nerasta
pdl2: Kommando nicht gefunden.
pdl2: kommandot finns inte
pdl2: komut yok
pdl2: nie znaleziono polecenia
pdl2: níor aimsíodh an t-ordú
pdl2: no se encontró la orden
pdl2: no s'ha trobat l'ordre
pdl2: opdracht niet gevonden
pdl2: parancs nem található
pdl2: perintah tidak ditemukan
pdl2: príkaz nenájdený
pdl2: příkaz nenalezen
pdl2: команда не найдена
pdl2: командата не е открита
pdl2: 命令找不到
pdl2: コマンドが見つかりません