ractl: 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/ractl - from package: ratools

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

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