radzap: 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/radzap - from package: freeradius-utils

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

On Debian possible default full paths are:

/usr/bin/radzap - from package: freeradius-utils

You may install the required package with command apt-get install {package}

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