filebench: 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/filebench - from package: filebench

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

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