A tool commonly used to test the reachability of a given host, either on the internet or in a local network.

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6
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1answer
317 views

Why the difference between network addresses reported by hostname and ping?

I have tried hostname and ping in a cluster machine, with different outputs. I am wondering what is the difference between the two? For example, on the same machine, hostname outputs node4.XXX and ...
6
votes
3answers
7k views

What prevents a machine from responding to pings?

I have a CentOS release 5.4 linux box on Amazon EC2 that I'm trying to set up to be monitored via Nagios. The machine is in the same security group as the nagios server, but it seems to be ...
1
vote
2answers
9k views

Changing the IP Address in Solaris 11

I am trying to change the IP address in Solaris, but am failing to do so. The IP address needs to be a fixed number, like 10.0.11.10 I have tried changing the IP address in /etc/hosts which I ...
0
votes
2answers
295 views

I require some help with traceping

Does anyone have an idea what Traceping is and where I can find good info about it? Googled for it but could not find some. Is there anywhere I could find out how to use traceping on Ubuntu? I tried ...
2
votes
2answers
10k views

Cannot connect to my Virtual Box Ubuntu system

I have a VirtualBox running an Ubuntu OS. I'd like to access this Ubuntu machine using ssh or telnet. In order to do that I've performed the following steps: sudo apt-get install telnetd sudo ...
2
votes
1answer
287 views

Constantly pinging a server

I am not sure if this is exactly the right place for this question, but there is no networking stack exchange. I want to ping a server a bunch of times (eg.10,000+) to gather information on the ...
3
votes
2answers
24k views

Host unreachable and I do not get why

I can not open a specific website. This is a website hosted by our company, and I know it is up. However, these are my symptoms: VARIABLES: host.com - the website I can not open x.x.x.x - the IP of ...
1
vote
2answers
310 views

need portable crontab host-checking/failover logic across Linux & Cygwin

A host-ping test that always works correctly from the interactive bash command line in Cygwin, is behaving incorrectly in its own crontab--always selecting the second host--and I can't figure out why: ...
3
votes
2answers
1k views

ping -c1, wait for all responses from broadcast

I want to send one packet to the broadcast address, but wait for all responses. If I do ping -c 1 192.168.1.255, it sends just one packet, but it quits after getting the first response.
2
votes
3answers
849 views

Send Email without any settings fast?

I am looking something like this on dummy comp, sending email fast without any login. I mean that I do not want to set up any .muttrc or any other settings. I want just a short msg to person A from ...
5
votes
3answers
8k views

How does traceroute resolve names?

While writing a script, I wanted to reference a machine by the computer name that I gave it (e.g. "selenium-rc"). I could not ping it using "selenium-rc", so I tried the following commands to see if ...
2
votes
2answers
737 views

Behavior of ping with partial packet loss on Ubuntu

I am specifically looking on the return variables of running ping on my Ubuntu server, the variables I am looking for is: error status, output on stdout, output on stderr. When pinging a host the ...
1
vote
1answer
364 views

Command-line way of send pinging

I have lots of Drupal powered website. Each of the website has Multiping module to pinging ping server. Is there any way of send pinging through command-line? I hope I can build dedicated server for ...
11
votes
2answers
39k views

What could DUP mean when using ping?

What could DUP mean when using ping?
4
votes
4answers
2k views

“internet connection checker one-liner”

With this I can check, that there is "internet connection". if there is no "internet connection" (succesfull pings to this 2 places), then it waits 600 sec, then it runs along: ping -W 1 -c 4 ...
3
votes
2answers
2k views

Problem pinging from a specific interface

I'm trying to ping from a specific interface, I have a wired and a wireless connection both going into my laptop. My wired adaptor eth0 is on the IP 172.16.109.75 My wifi adaptor wlan0 is on the IP ...
2
votes
0answers
418 views

Network via ieee1394 is unreachable (PC and laptop)

I decided to connect my PC to the laptop via firewire. All interfaces are up, but no packets can be send/recieved. I'm using Linux Slackware64-current (kernel 2.6.37.4) Laptop (Dell Vostro 3700) has ...
1
vote
2answers
3k views

What is a valid hostname label?

I set up my hostname to a number, where running hostname gives: 6592 But when I run ping 6592, I get: connect: Invalid argument I checked the related Wikipedia page, and it does say that such a ...
13
votes
7answers
8k views

Faster way than ping for checking if computer online?

I'm writing a wake on lan script for a set of our lab computers. We have sqlite db with a list of the computer hostnames, IPs, and MACs and currently I ping each of them with '-c1' so it doesn't run ...
4
votes
2answers
2k views

Can't ping broadcast

We're running four computers connected to a hub (yes a hub not a switch) on Fedora 13. They were installed using images from a colleague that has recently left us to go back to school, they may have ...
4
votes
3answers
5k views

How can i check that a remote computer is online for ssh / script acess?

i'm writting a script that will backup data from my laptop to an ubuntu server. to do so, i'm looking for a (ba)sh command to test if the server is available before starting the backup. something like ...
2
votes
1answer
389 views

Redhat Enterprise Linux 4.7 - Ping problem

When I try to ping some of the IP addresses I get "connect: No buffer space is available" error. Also when I check /var/log/messages, there are some errors like as following printk: 99 messages ...