bloom-update: command not found

Have You tried accessing the binary with the full path?

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/bloom-update - from package: python-bloom

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