rmol-config: 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/rmol-config - from package: rmol-devel

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

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