rpmfile: 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/rpmfile - from package: rpmdevtools

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

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