radstatus: 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/radstatus - from package: radiusclient-ng-utils

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

On Debian possible default full paths are:

/usr/sbin/radstatus - from package: libfreeradius-client-dev

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

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