hi i am a student from india doing it engineering ..i would be very thankful if you help me with this query related to ping wrt linux .

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Linux
Networking
we just started working on linux as an operating system thats the redhat version . i have tried giving following command in colon on the command line and get the following output which i quite donot understand ....so if you could explain what the output implies that would be nice ... """[it020934@IBM1 it020934]$ ping google.com -c 5 """"' OUTPUT /////////////// PING google.com (216.239.57.99) 56(84) bytes of data. 64 bytes from 216.239.57.99: icmp_seq=0 ttl=243 time=392 ms 64 bytes from 216.239.57.99: icmp_seq=1 ttl=243 time=341 ms 64 bytes from 216.239.57.99: icmp_seq=2 ttl=243 time=358 ms 64 bytes from 216.239.57.99: icmp_seq=4 ttl=243 time=306 ms --- google.com ping statistics --- 5 packets transmitted, 4 received, 20% packet loss, time 4030ms rtt min/avg/max/mdev = 306.255/349.614/392.067/30.954 ms, pipe 2 ////////////////////// thanx sushant arora
ASKED: October 27, 2004  1:13 AM
UPDATED: October 27, 2004  3:35 AM

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Hi,

When you type the ping command, your asking the system to send a packet of data, and then wait for a reply.(an echo).

The output you see is the size of the ICMP packet sent to the host you specified(google.com or the IP address google resolved to. ) in this case 64 bytes. The ICMP_seq is just a runnning count of the number of packets sent to the host.

ttl (Time To Live). This means if the echo ( reply from host) is not received within the time period, the packet is lost and the therefore did not reply.

time is the “round trip time” ie the amount of time it took for your linux system to send the icmp packet and get the response back from the host ( google.com )

Hope this helps.
Regards
Derek.

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