I am using freeradius_1.1.3 i want to test the capacity of it. For that i m using radclient tool to measure the capacity. I want to test how much request per second radius is capable to handle for that i m firing the below mention command. echo "User-Name = 10001@10.0.0.1", "CHAP-Password = 1234" | radclient 10.0.0.2 auth test123 But when i m using -n option with radclient it is giving me below error # echo "User-Name = 10001@10.0.0.1", "CHAP-Password = 1234" | radclient -n 10 10.0.0.2 auth test123 radclient: invalid option -- n Usage: radclient [options] server[:port] <command> [<secret>] <command> One of auth, acct, status, or disconnect. -c count Send each packet 'count' times. -d raddb Set dictionary directory. -f file Read packets from file, not stdin. -r retries If timeout, retry sending the packet 'retries' times. -t timeout Wait 'timeout' seconds before retrying (may be a floating point number). -i id Set request id to 'id'. Values may be 0..255 -S file read secret from file, not command line. -q Do not print anything out. -s Print out summary information of auth results. -v Show program version information. -x Debugging mode. When i am seeing the man radclient Than the option n is giving so please tell me how should i use the command . Thanks