dpid: 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/dpid - from package: dillo

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