update-reader.conf: 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/sbin/update-reader.conf - from package: pcsc-lite

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

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