pbd: 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/lib/plan9/bin/pbd - from package: 9base

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

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