bs2bstream: 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 CentOS possible default full paths are:

/usr/bin/bs2bstream - from package: libbs2b

You may install the required package with command yum install {package}

Error in other languages:
bs2bstream: bevel nie gevind nie
bs2bstream: comandă negăsită
bs2bstream: comando não encontrado
bs2bstream: commande introuvable
bs2bstream: command not found
bs2bstream: käsku ei ole
bs2bstream: không tìm thấy lệnh
bs2bstream: komanda nerasta
bs2bstream: Kommando nicht gefunden.
bs2bstream: kommandot finns inte
bs2bstream: komut yok
bs2bstream: nie znaleziono polecenia
bs2bstream: níor aimsíodh an t-ordú
bs2bstream: no se encontró la orden
bs2bstream: no s'ha trobat l'ordre
bs2bstream: opdracht niet gevonden
bs2bstream: parancs nem található
bs2bstream: perintah tidak ditemukan
bs2bstream: príkaz nenájdený
bs2bstream: příkaz nenalezen
bs2bstream: команда не найдена
bs2bstream: командата не е открита
bs2bstream: 命令找不到
bs2bstream: コマンドが見つかりません