radlast: 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/radlast - from package: freeradius-utils

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

On Debian possible default full paths are:

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

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

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