Comments on: Ping Tutorial: 15 Effective Ping Command Examples

By: Greg Janssen

Greg Janssen — Thu, 27 Oct 2011 18:38:46 +0000

This must not be about Windows XP! Parts of it do not work with XP. Can the Increase Decrease Time Internal of Ping packets be shown for XP? Thanks.

By: TK Nallappan

TK Nallappan — Sat, 06 Aug 2011 22:36:38 +0000

Hi All,

Here is the command to protect yourself from a form of attack known as a ‘ping flood’

# sysctl -w net.ipv4.icmp_echoreply_rate=10

By: saikrishna

saikrishna — Mon, 18 Jul 2011 10:09:30 +0000

super article

By: Anonymous

Anonymous — Wed, 23 Mar 2011 11:12:39 +0000

superb article

By: How To Disable Ping Replies in Linux using icmp_echo_ignore_all

How To Disable Ping Replies in Linux using icmp_echo_ignore_all — Fri, 09 Jul 2010 06:03:31 +0000

[...] can flood the network with ping -f as shown in “Ping Example 5″ in our earlier Ping Tutorial article. If ping reply is disabled we can avoid this [...]

By: Can You Top This? 15 Practical Linux Top Command Examples

Can You Top This? 15 Practical Linux Top Command Examples — Mon, 04 Jan 2010 06:03:46 +0000

[...] series, earlier we discussed about find command, crontab examples, grep command, history command, ping command, and wget [...]

By: Reza

Reza — Mon, 21 Dec 2009 06:17:46 +0000

Thanks for your very nice tutorial. Could you please also help me with these two questions:

1- Ping claims to give an estimation about RTT(Round Trip Time) for SPECIFIC PACKET SIZE. But as it shows the packet that is coming back is 20Bytes less. So we have a RTT for which packet size (86 which goes or 66 which is coming back) ?

2-What does “mdev” means in mid/avg/max/mdev

By: Ramesh Natarajan

Ramesh Natarajan — Thu, 10 Dec 2009 23:55:16 +0000

@Salih, Diptanu,

Thanks for the comment. I’m very glad you found this article helpful.

@Raghu,

Yes. Lot of people underestimate the power of ping.

@Sravan,

If you are trying to do a ‘ping -a’ on a remote server, you’ll hear the beep only on the host where the ping command is getting executed.

For example, from your laptop, if you’ve ssh-ed to dev-db and executing ‘ping -a google.com’ on dev-db, you’ll hear the beep only on the dev-db box.

@Netspider,

That is strange. I’m not sure why that is happening. When you do, ping 0, it is supposed to ping only the local host and not even the gateway. Are there any strange entries in your /etc/hosts file?

By: NetSpider

NetSpider — Sun, 06 Dec 2009 19:12:07 +0000

i’ve got strange result on FreeBSD

~> netstat -r -n
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default a.b.c.1 UGS 0 66309126 em0

Okay, my GW is a.b.c.1. But when i’m going to ping 0, i’ve got this:

~> ping 0.0.0.0
PING 0.0.0.0 (0.0.0.0): 56 data bytes
64 bytes from a.b.c.2: icmp_seq=0 ttl=64 time=0.261 ms
64 bytes from a.b.c.2: icmp_seq=1 ttl=64 time=0.109 ms
^C

i don’t know why.. =(
0 should be my default GW (!not 127.0.0.1!)

By: Sravan Babu

Sravan Babu — Sat, 05 Dec 2009 06:53:43 +0000

Hi Ramesh…Awesome tut on ping

but I m unable
to use the audible option
When I use ” ping -a google.com”
I m not able to hear any beep