I think I saw a program called "uping" or "mping" which had more fine-grained timing controls (I think part of the MRTG suite ... could have been "fastping" too).
Two other ideas come to mind.
1. Run asynchronously. Spawn off a big bunch of pings and even if some of them take one second or more, the whole bunch will finish in one or two seconds (provided you have the CPU and bandwidth to run enough of them in parallel).
Code:
subnet=192.168.2.
for addr in `seq 1 1 255 `; do
( ping -c 1 -t 1 $subnet$addr > /dev/null && echo Found $subnet$addr ) &
done
2. Is ping really what you want? If you have a hunch about a port you could expect to be open, netcat could do this much faster (and probably produce more accurate results -- the fact that ping works doesn't really mean the host is up and working correctly).
The problem I am facing now is that the QNX host could not ping the SCO host and vice versa. They are in the same domain, ie, 172.20.3.xx. As I am very new to Unix, I guess I must have missed out some important steps. Pls help... Thanx alot (2 Replies)
Hi all,
i am copying .gz files from production server to development server using
"scp" command.my requirement is after copying .gz files i want to delete old
.gz files(two days back) in development server from production server.
like this way i need to delelte .log ,.z and .dmp files... (3 Replies)
Gurus/Experts
We have a centralized UNIX/Solaris server from where we can actually ssh to all other UNIX/Solaris servers...I need to write a script that reside on this centerlized server and do FileSystem monitoring (basically run df -h or -k) of other remote servers and then send an email to me... (6 Replies)
I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1.
When I do a who -m from A2, I see the "connected from" as "A1".
=> who -m
userid pts/2 2010-03-27 08:47 (A1)
I want to identify who is the local host who initiated the connection to... (3 Replies)
Hello....
I have two servers, one has an empty / and the other has a subdirectory with a large number (4 gig) with many, many files. I need a way to transfer the files en masse from the server with the large number of files to the one that is essentially blank.
I don't have space on the used... (16 Replies)
Hi all,
This is my sample code in /etc/httpd/conf.d/applications.conf file currently we are creating subdomain mannually for every new subdomain. I want to automate this process througs bash script , how its possible.
<VirtualHost *:80>
ServerName google.com
ServerAlias google.com... (5 Replies)
Im trying to write a script using the host command but its not working properly. I cant understand what Im doing wrong. When I use it at the command prompt, it works fine. But its being used actually in the script, it says its not found: 2 SERVFAIL. Can anyone help me? Here's what I have so far: no... (6 Replies)
Hi All
I am having VxVm on two Solaris hosts. host1 is using disk group dgHR. right now this server went down due to hardware fault. Not I need to import this dgHR into host2 server. Please let me know the procedure for the same. (1 Reply)
Hello Everyone,
My following script is giving me problems, when the SIP trunk goes down and the telnet session is started and just when the command is about to complete the connection is closed then script restarts.
I have noticed that as soon the script types in "sys re" or "sys rebo" or... (6 Replies)
Discussion started by: jeetz
6 Replies
LEARN ABOUT ULTRIX
ping
ping(8) System Manager's Manual ping(8)Name
ping - send ICMP ECHO_REQUEST packets to network hosts
Syntax
/etc/ping [ options ] host [ datasize [ npackets ]]
Description
The DARPA Internet is a large and complex network of hardware connected together by gateways. The command utilizes the ICMP protocol's
mandatory ECHO_REQUEST datagram to elicit an ICMP ECHO_RESPONSE from a host or gateway. ECHO_REQUEST datagrams (pings) have an IP and ICMP
header, followed by a struct timeval, and then an arbitrary number of pad bytes used to fill out the packet. The length of the default
datagram 64 bytes, but this may be changed using the command-line option.
Typing ``ping host'' without any options will either report ``host is alive'' or ``no answer from host''. To get more statistics use the
-l option or one of the other options.
When using for fault isolation, it should first be run on the local host to verify that the local network interface is up and running.
Then, hosts and gateways further and further away should be pinged. The command with options sends one datagram per second and prints one
line of output for every ECHO_RESPONSE returned. No output is produced if there is no response. If an optional npackets is given, only
that number of requests is sent. Round-trip times and packet loss statistics are computed. When all responses have been received or the
program times out with npackets specified, or if the program is terminated with a SIGINT, a brief summary is displayed.
Options-d Turns on SO_DEBUG flag on the socket.
-l Gives more statistics than if is used without options. Long output.
-r Bypasses the normal routing tables and sends directly to a host on an attached network. If the host is not on a directly-attached
network, an error is returned. This option can be used to ping a local host through an interface that has no route through it. For
example, after the interface was dropped by
-v Lists ICMP packets other than ECHO RESPONSE that are received. Verbose output.
Restrictions
This program is intended for use in network testing, measurement, and management. It should be used primarily for manual fault isolation.
Because of the load it could impose on the network, it is unwise to use during normal operations or from automated scripts.
See Alsonetstat(1), ifconfig(8c)ping(8)