lcg-replica-manager: 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/lcg-replica-manager - from package: lcg-util

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

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