bd_info: 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/bd_info - from package: libbluray

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

On Debian possible default full paths are:

/usr/bin/bd_info - from package: libbluray-bin

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

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