bpsource: 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/bpsource - from package: ion

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

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