bzr-buildpackage: 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/bzr-buildpackage - from package: bzr-builddeb

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

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