frm_purged: 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/frm_purged - from package: xrootd-server

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

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