genrings: 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/genrings - from package: kup-utils

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

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