ubuntu radius server

# apt-get install freeradius freeradius-mysql freeradius-utils

# vi /etc/freeradius/users
205 testing Cleartext-Password := "12345"
# freeradius -X
// radtest username password server auth_port secret
$ radtest testing 12345 localhost 1812 testing123




Reference :
FreeRADIUS -- Documentation
Basic Configuration Howto
Howto: Freeradius on Ubuntu 9.04