Networking :: Tcp_probe Doesn't Collect All The Data?
May 2, 2011
I'm trying to plot the TCP congestion window and the slow start threshold using iperf and the tcp_probe module. I do exactly what is told here:
to obtain the data:
modprobe tcp_probe port=5001
chmod 444 /proc/net/tcpprobe
cat /proc/net/tcpprobe >/tmp/tcpprobe.out &
TCPCAP=$!
[Code]....
I did the test with iperf for 10, 20, 40 100 and 200 seconds but the plot only showed the first 20 seconds in all of the tests. I checked the tcpprobet.out log and y saw that 2048 entries are registered, no matter if the test was for 20 or 200 seconds.
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Feb 4, 2010
I'm using ubuntu 9.10 with kernel 2.6.33.I want to plot the cwnd of some tcp connections over the time.So I activate the module (as root) with:modprobe tcp_probeand after that I did:cat /proc/net/tcpprobe > test.log &And than I do a little bit surfing or other things, which use tcp - but the file test.log is empty
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Feb 2, 2011
We need to collect data from nagios once a week and have it sent/mailed.What would be a good place to get it? I am thinking starting with nagios/var/nagios.logscan it once a week and get most recent entries from each hosts.
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Apr 6, 2010
I have a firewall, this consists of three NIC's:
Code: eth0[192.168.0.2] eth1[192.168.1.2] and eth2[10.10.165.2]
I am trying to ping eth0 from eth2, but I am not able to succesfully get a response from pinging the device, I am using:
Code: ping 192.168.0.2 -I eth2
I have tried to insert routing data into the routing table, but it still doesn't work
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Feb 8, 2011
i wondered if there is no gnome Software with it would be possible to "Collect" multiple Windows together.
As 4 Terminals or 2 Terminals and a gedit.
I dont think about tabbed views, i think about viewing them side by side. I know that it would be _possible_ to this by hand, but it would be *much* easier doing this with an application. I often want to see 4 terminals at a time and its really unhandy to do this by hand
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Dec 26, 2010
I am installing RHEL 5.5 to be a syslog server to collects logs from servers (HP-UX, Linux, Windows and Cisco Network Devices). and i can now collect logs from my windows PC on syslog linux server by using Datagram SyslogAgent software. can collect logs from HP-UX 11.23 server. and i configuring the Unix server as in the steps below:
1. Log in as root
2. Go to /etc/syslog.conf
3. Add a line: *.*<tab>@<Sentinel Server IP Address>
*.* @10.15.1.5
4. Save and Close
# netstat -na | grep 514
tcp 0 0 *.514 *.* LISTEN
udp 0 0 *.514 *.*
[code]....
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Dec 10, 2010
how to collect the memory Dump In Linux?
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Apr 21, 2010
I have a pool of approximately 1,000 Linux servers and I would like to get a total count of reboots that occurred on those servers each month. I would like to collect this reboot count at the end of each month. Can anyone tell me what the best way to get this count.
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Mar 5, 2010
I have an application where I am sending data via serial port from PC1 (Java App) and reading that data in PC2 (C++ App). The problem that I am facing is that my PC2 (C++ App) is not able to read complete data sent by PC1 i.e. from my PC1 I am sending 190 bytes but PC2 is able to read close to 140 bytes though I am trying to read in a loop.Below is code snippet of my C++ AppOpen the connection to serial port
Code:
serialfd = open( serialPortName.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
if (serialfd == -1)
[code]...
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Nov 15, 2010
I use AOL for my mail i cant use a terminal mail client mutt etc, If I let thunderbird download mail to my home server (pc in corner) is it possible to collect the mail from there with mutt etc AND Thunderbird on another machine. Summary download aol with thunderbird to server then collect it later with other laptops / email clients
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Mar 29, 2010
I have set up one Fedora 10 server.I found that rsyslog service is running on Fedora 10 server.How to configure rsyslog on Fedora 10 to collect the log from Cisco ASA5510 ?
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Oct 6, 2010
I am currently interning at a place and my job is to essentially learn UNIX. My supervisor gives me problems here and there to help guide me with my learning but for the most part I'm doing this all by self-teaching myself. Needless to say I have run into a few obstacles...for instance-Create a *one* line command that, using tar, will collect the full /usr/local directory (you need to run this as root again) and copy the whole /usr/local structure under /optFor example /usr/local/bin/hello will become /opt/local/bin/hello, etc. I want this as follows:1. /usr/local is collected by tar, but the output of this tar command is its stdout.. what you get from the previous stdout, you compress with gzip and send it to stdout again 3. get this output and decompress with gzip.. get this output and pipe to tar in a way that will extract the tree under /opt.If anyone knows how I could go about doing this, please let me know, or at the very least point me in the right direction. What I've got so far (which could be completely wrong) is:tar cvf - usr/local/ | gzip -c - | gunzip -c - | tar xvf -in theory I feel like this should work (except for extracting the tree under /opt...i'm kinda stuck there)
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Oct 10, 2010
am running Centos 5.4 and would like to write a small perl script to collect some info from mysql.
so I went
yum install perl-DBI
yum install perl-DBD-mysql
then
nano perl.pl
---
#!/bin/perl
use Mysql;
[Code].....
Why can't perl find Mysql.pm? I guess because it doesn't exist as I ran find / -name Mysql.pm, and also could not find it.
shouldn't that file have been created and thus exist after I install perl-DBD-mysql?
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Nov 7, 2010
This version of mutt seems to be broken ... at least as far as working with motion and msmtp to automatically transmit detected video images to my e-mail account.
I don't see any errors, mutt simply doesn't transmit the data via msmtp as it should.
I switched back to the version of Mutt in Slackware 13.1 and the automatic transmission of video detected by motion and transmitted by mutt via msmtp started working properly.
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Apr 20, 2011
1. Maverick Meerkat 10.10
2. Vista Ultimate
I'm successfully connecting to my Vista desktop via my laptop running MM;I can view my shares but not all my data. All top level shares seem to be visible, it's when I go deeper that I notice not everything is showing up. The folders are accessible if I type the full path, and then again I have the same issue once I'm inside that folder where not all data is visible.
In Nautilus setting: Edit>Pref>Preview Tab.I set preview for all files under 4GB which is the upper limit I can set.This made more files visible but not everything.I attempted to divide the directories in order to halve the size of the folders, this helped but not completely. The directories contain movie and picture files. The picture files are easier to divide more equitably between folders, but the movies being so large, managing folders sizes in that way doesn't help. I really don't want to divide my files according to this problem anyway. Sorting does not affect which folders and files are shown. Nothing is hidden, options to show hidden files on amd off, no help.
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Jun 29, 2010
I needed to install a new OS on a new HD but i also need the data on the old HD which has some problems (it doesn't boot anymore). The problem is that in the old one i had linux (Slackware) and so it doesn't allow me to view the content of the folder /home/myself. If there was something possible to do to recover all the data or if it will be forever lost.
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Dec 12, 2010
I am using Open office 3.2 with Ubuntu 10.10. Trying to get it set up to print out the Christmas address labels. To register the data source its 'FILE'> 'WIZARDS' then' ADDRESS DATA SOURCE.' But OO doesn't show the 'ADDRESS DATA SOURCE' at the bottom of the list, so I am stuck. Apart from that, I have had no problems with ubuntu and its working well.
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Feb 17, 2010
I want to write a shell script which will simultaneously collect OS user information and write in an individual text files.Can anyone tell me the syntax of the script.N.B. The user name will be mentioned in an array within the shell script.
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Nov 28, 2010
" Mark the start of the text with "v", "V" or CTRL-V. The character under the cursor will be used as the start.""With CTRL-V (blockwise Visual mode) the highlighted text will be a rectanglebetween start position and the cursor."I can mark the start with "v" or "V".But it doesn't work when I push ctrl+V.
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Jun 12, 2010
when I try to transfer a folder from the desktop machine to laptop I get the following:
Code:
morad@linux-m9c6:~> cd /data/
morad@linux-m9c6:/data> scp -r nobani@192.168.1.3:/data/geant .
Password:
[Code]....
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Jul 26, 2011
Recently I had a situation where I had to transfer data from a PC to a Mac. Usually we simply convert the data as necessary, ie. bookmarks, contacts, etc. move the info to a dropbox account and use Windows networking to access the dropbox from a Mac. Well, there was a network issue and it was suggested that I boot to Ubuntu and do this. We do have Ubuntu on a flash drive but I was lost from there. Can anyone point me in the direction of documentation or assist me in understanding how this would be accomplished? I have a Mac, PC and Linux box at home so hopefully I have all the necessary tools to test this out.
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Feb 1, 2011
I have been tasked with accessing data stored on a WD Sharespace drive. I have a machine running Fedora 13 at my disposal to do this. So far I am running into dead ends. The drive is connected via Ethernet, but I have never accessed a network drive in Linux before.
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Jun 24, 2011
I need to know how a data packet is transmitted from the sender to the receiver passing through the five Internet layers. Specially what device (hardware) the data packets have to pass through at each layer before reaching the destination in a LAN.
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Aug 19, 2009
I am quite newbie with Linux networking and I want to know if there exist a log in Linux where errors during transfers are stored. I mean, when I'm transferring data between two hosts is there any way to log somewhere (where?) the errors or warning during the transfer? That is, connection failures, TCP or UDP errors, etc.? Is there any "log level" to select the errors to be displayed in the log not to work with a huge log file?
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Jul 9, 2010
i have server and client, my client is sending data of 100 bytes at a time but server side i am receiving 50 bytes once and in next iteration i am calling recv function for receiving remaining 50 bytes but the receive is blocked it doesn't reading any data? Does any body have a idea let me know
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Oct 18, 2010
I'm trying to capture packets to a file with the -w option but the file is empty yet if I use the '-w -' option to put data on stdout I see plenty of captured packets.I'm using CentOS 5.5 x86
Code:
[root@server ~]# tcpdump -v -i eth0 -w dump -s0
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
[code]....
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Oct 6, 2010
Where apart from ~/.kde4/share/apps/kmail does kmail keep account data, such as login data/names of pop/smtp servers? I wanted to install an entirely clean version of kmail, so I uninstalled/re-installed kmail via YAST. I manually deleted ~/.kde4/share/apps/kmail. After installing kmail I found that the account data of my Yahoo account were still listed in the kmail configuration panel. Shall I delete the Yahoo account within kmail prior to uninstalling the kmail package?
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Jul 14, 2010
A few months ago I have setup a server with three hard disks. The partition mapping the disks as follows:
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x7ca36fee
[code]....
Now I have the following problem the LVM file system don't mount properly.If I open the mount point I see only a few files of the LVM disk. If I want to unmount the disk I get the following error:
umount /data/
umount: /data/: not mounted
If I want to mount the volume I get the following error:
mount -a
mount: /dev/mapper/gegevens-Data already mounted or /data busy
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Jan 23, 2010
I'm trying to connect to the VPN of my employer; after fix various minor issues I reach this point in which the DNS entries and the default gateway of the VPN are overwritten with the values of the eth0 device that appears by default. Therefore the vpn is not useful.
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Jun 11, 2009
I am using read() in c++ to get data from a serial port. However, if no data is available on the serial port the function blocks until dta arrives.Example code:
//------------------------------------------------------------
char m_readBuffer[255] = {0};
char* p_curChar = m_readBuffer;
[code]...
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