radconf2xml: 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/radconf2xml - from package: freeradius-utils

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

Error in other languages:
radconf2xml: bevel nie gevind nie
radconf2xml: comandă negăsită
radconf2xml: comando não encontrado
radconf2xml: commande introuvable
radconf2xml: command not found
radconf2xml: käsku ei ole
radconf2xml: không tìm thấy lệnh
radconf2xml: komanda nerasta
radconf2xml: Kommando nicht gefunden.
radconf2xml: kommandot finns inte
radconf2xml: komut yok
radconf2xml: nie znaleziono polecenia
radconf2xml: níor aimsíodh an t-ordú
radconf2xml: no se encontró la orden
radconf2xml: no s'ha trobat l'ordre
radconf2xml: opdracht niet gevonden
radconf2xml: parancs nem található
radconf2xml: perintah tidak ditemukan
radconf2xml: príkaz nenájdený
radconf2xml: příkaz nenalezen
radconf2xml: команда не найдена
radconf2xml: командата не е открита
radconf2xml: 命令找不到
radconf2xml: コマンドが見つかりません