pdp-config: 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/pdp-config - from package: pd-pdp

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