bacula-fd: 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/sbin/bacula-fd - from package: bacula-client

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

On Debian possible default full paths are:

/usr/sbin/bacula-fd - from package: bacula-fd
/usr/lib/debug/usr/sbin/bacula-fd - from package: bacula-fd-dbg

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

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