1-  First Way ::

   I_is To Make a Broadcast Ping ( for sending a request to all the person on the same router ) :

                 ping -b 192.168.1.255 
       
            or

              ping -b 255.255.255.255






   II_ Second is to see whos is connect from the same router ,
            for this we use arp table to see all the persons connecting :p


             arp -n 




2 - Second Ways ::

is Using My Scripts

   Principe : the Script send a loop  request from The adresse @ 192.168.1.0  to 192.168.1.x   (  x is variable )


The Scripts ;

#!/bin/bash




$i=0
for((i=0;30-$i;i++))
do ping -c 1 192.168.1.$i
done


arp -n 

exit 0 




To Run script go to my tutorial about scripts ;)
it will make The Same Result :)



II_ Theorie ::

1. To check the network connection to host canopus and specify the number of echo requests to send, enter:
   ping  -c 5 canopus
   OR
   ping canopus  56  5
   Information similar to the following is displayed:

   PING canopus.austin.century.com: (128.116.1.5): 56 data bytes
   64 bytes from 128.116.1.5: icmp_seq=0 ttl=255 time=2 ms
   64 bytes from 128.116.1.5: icmp_seq=1 ttl=255 time=2 ms
   64 bytes from 128.116.1.5: icmp_seq=2 ttl=255 time=3 ms
   64 bytes from 128.116.1.5: icmp_seq=3 ttl=255 time=2 ms
   64 bytes from 128.116.1.5: icmp_seq=4 ttl=255 time=2 ms
   
   ----canopus.austin.century.com PING Statistics----
   5 packets transmitted, 5 packets received, 0% packet loss
   round-trip min/avg/max = 2/2/3 ms

2. To get information about host lear and start socket-level debugging, enter:
   ping  -d lear
   Information similar to the following is displayed:

   PING lear.austin.century.com: (128.114.4.18) 56 data bytes
   64 bytes from 128.114.4.18: icmp_seq=0 ttl=255 time=6 ms
   64 bytes from 128.114.4.18: icmp_seq=1 ttl=255 time=17 ms
   64 bytes from 128.114.4.18: icmp_seq=2 ttl=255 time=6 ms
   64 bytes from 128.114.4.18: icmp_seq=3 ttl=255 time=6 ms
   64 bytes from 128.114.4.18: icmp_seq=4 ttl=255 time=6 ms
   ^C
   ----lear.austin.century.com PING Statistics ----
   5 packets transmitted, 5 packets received, 0% packet loss
   round-trip min/avg/max = 6/8/17 ms

   Note: The output is repeated until an Interrupt (Ctrl-C) is received.

3. To obtain information about host opus and specify the number of data bytes to be sent, enter:
   ping  -s 2000 opus
   OR
   ping opus  2000
   Information similar to the following is displayed:

   PING opus.austin.century.com: (129.35.34.234): 2000 data bytes
   2008 bytes from 129.35.34.234: icmp_seq=0 ttl=255 time=20 ms
   2008 bytes from 129.35.34.234: icmp_seq=1 ttl=255 time=19 ms
   2008 bytes from 129.35.34.234: icmp_seq=2 ttl=255 time=20 ms
   2008 bytes from 129.35.34.234: icmp_seq=3 ttl=255 time=20 ms
   2008 bytes from 129.35.34.234: icmp_seq=4 ttl=255 time=20 ms
   2008 bytes from 129.35.34.234: icmp_seq=5 ttl=255 time=19 ms
   2008 bytes from 129.35.34.234: icmp_seq=6 ttl=255 time=19 ms
   ^C
   ----opus.austin.century.com PING Statistics----
   7 packets transmitted, 7 packets received, 0% packet loss
   round-trip min/avg/max = 19/19/20 ms

   Note: The output is repeated until an Interrupt (Ctrl-C) is received.

4. To invoke the flood-ping option to host stlopnor, enter:
   ping  -f stlopnor
   Information similar to the following is displayed:

   Ping stlopnor.austin.century.com: (129.35.34.234): 56 data bytes
   .^C
   ----stlopnor.austin.century.com PING Statistics ----
   1098 packets transmitted, 1097 packets received, 0% packet loss
   round-trip min/avg/max = 4/4/11

   Note: The flood-ping output continues until an Interrupt (Ctrl-C) is received.

5. To specify an interval of five seconds between packets sent to host opus, enter:
   ping  -i5 opus
   Information similar to the following is displayed:

   PING opus.austin.century.com: (129.35.34.234): 56 data bytes
   64 bytes from 129.35.34.234: icmp_seq=0 ttl=255 time=5 ms
   64 bytes from 129.35.34.234: icmp_seq=1 ttl=255 time=5 ms
   64 bytes from 129.35.34.234: icmp_seq=2 ttl=255 time=6 ms
   ^C
   ----opus.austin.century.com PING Statistics----
   3 packets transmitted, 3 packets received, 0% packet loss
   round-trip min/avg/max = 5/5/6 ms

   Note: The output is repeated until an Interrupt (Ctrl-C) is received.

6. To send the number of packets specified by the Preload variable as fast as possible before falling into normal mode of behavior to host opus, enter:
   ping  -l 10 opus
   Information similar to the following is displayed:

   PING opus.austin.century.com: (129.35.34.234): 56 data bytes
   64 bytes from 129.35.34.234: icmp_seq=0 ttl=255 time=9 ms
   64 bytes from 129.35.34.234: icmp_seq=1 ttl=255 time=11 ms
   64 bytes from 129.35.34.234: icmp_seq=2 ttl=255 time=16 ms
   64 bytes from 129.35.34.234: icmp_seq=3 ttl=255 time=22 ms
   64 bytes from 129.35.34.234: icmp_seq=4 ttl=255 time=26 ms
   64 bytes from 129.35.34.234: icmp_seq=5 ttl=255 time=27 ms
   64 bytes from 129.35.34.234: icmp_seq=6 ttl=255 time=30 ms
   64 bytes from 129.35.34.234: icmp_seq=7 ttl=255 time=31 ms
   64 bytes from 129.35.34.234: icmp_seq=8 ttl=255 time=33 ms
   64 bytes from 129.35.34.234: icmp_seq=9 ttl=255 time=35 ms
   64 bytes from 129.35.34.234: icmp_seq=10 ttl=255 time=36 ms
   64 bytes from 129.35.34.234: icmp_seq=11 ttl=255 time=6 ms
   64 bytes from 129.35.34.234: icmp_seq=12 ttl=255 time=6 ms
   64 bytes from 129.35.34.234: icmp_seq=13 ttl=255 time=6 ms
   64 bytes from 129.35.34.234: icmp_seq=14 ttl=255 time=7 ms
   64 bytes from 129.35.34.234: icmp_seq=15 ttl=255 time=6 ms
   ^C
   ----opus.austin.century.com PING Statistics----
   16 packets transmitted, 16 packets received, 0% packet loss
   round-trip min/avg/max = 6/19/36 ms

   Note: The output is repeated until an Interrupt (Ctrl-C) is received.

7. To diagnose data-dependent problems in a network, enter:
   ping  -p ff opus
   This command sends packets with a pad-pattern of all 1's to host opus. Information similar to the following is displayed:

   PATTERN: 0xff
   PING opus.austin.century.com: (129.35.34.234): 56 data bytes
   64 bytes from 129.35.34.234: icmp_seq=0 ttl=255 time=5 ms
   64 bytes from 129.35.34.234: icmp_seq=1 ttl=255 time=5 ms
   64 bytes from 129.35.34.234: icmp_seq=2 ttl=255 time=5 ms
   64 bytes from 129.35.34.234: icmp_seq=3 ttl=255 time=6 ms
   64 bytes from 129.35.34.234: icmp_seq=4 ttl=255 time=5 ms
   ^C
   ----opus.austin.century.com PING Statistics----
   5 packets transmitted, 5 packets received, 0% packet loss
   round-trip min/avg/max = 5/5/6 ms

   Note: The output is repeated until an Interrupt (Ctrl-C) is received.

8. To specify quiet output, enter:
   ping  -q bach
   Only summary information similar to the following is displayed:

   PING bach.austin.century.com: (129.35.34.234): 56 data bytes
   ^C
   ----bach.austin.century.com PING Statistics----
   5 packets transmitted, 5 packets received, 0% packet loss
   round-trip min/avg/max = 5/5/8 ms