keyring: 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/keyring - from package: python-keyring

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

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