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  • I'm looking for a monitor tool to test Jitter, ICMP, Traceroute and other network issues

    - by Elad Dotan
    I'm looking for a monitor tool to test Jitter, ICMP, Traceroute and other network issues. it could be an application I run from my company Network in NY and London or a SAAS service that have a service that can do it for me. I have a problem in my Data Center that I would like to fix. it happens in different times of the day. I want to run the monitor for few days and save the results so we can analyze them. any idea? Thanks!! Elad.

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  • What is the difference between sar -B verses sar -W

    - by Mark
    I am trying to understand why my system is running slowly. I found the sar command, but wanted to know the difference between sar -B and sar -W I read the man page, and I understand that -B gives me the paging statistics and -W gives me the swapping statistics. What I would like to understand is the following: What is the correlation between the two sets of statistics. When should I be concerned about -B and when about -W? ie, what values from each command should I be concerned with? Which statistic is more closely related to system performance Thanks

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  • why dstat failed with --tcp option?

    - by hugemeow
    why --tcp option failed? should i install some package? if yes, which package i should install? this question is not the same as http://stackoverflow.com/questions/10475991/tcp-sockets-double-messages dstat --tcp Module tcp has problems. (Cannot open file /proc/net/tcp6.) None of the stats you selected are available. what is the problem with module tcp, how to find the problem? what i should do in order to fix this issue?

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  • Mouse button and keypress counter for Linux?

    - by rakete
    I would like to have some kind of statistic of my daily mouse/keyboard usage to help me make my keyboard layout a little bit more efficient. There is already an question about how to do this on windows, but I would like to know I anyone is aware if this is possible under linux. Another thing I already found is key-mon, a little program for screencasts that displays your mouse and keyboard presses on the screen, which would help me achieve what I want with a little bit of python coding by myself. But still, if there was an solution already, that would be easier of course. PS: obfuscated link to key-mon because of spam prevention: hxxp://code.google.com/p/key-mon/

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  • Monitor open files limits, etc

    - by marcog
    We've been hitting the max open files limit on a few services recently. There are also a bunch of other limits in place. Is there a way to monitor how close processes are to these limits so we can be alerted when it's time to either up the limits or fix the root cause? On the same note, is it possible to view a log of these events so we know when a crash occurs it's because of hitting one of these limits?

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  • Real benefits of tcp TIME-WAIT and implications in production environment

    - by user64204
    SOME THEORY I've been doing some reading on tcp TIME-WAIT (here and there) and what I read is that it's a value set to 2 x MSL (maximum segment life) which keeps a connection in the "connection table" for a while to guarantee that, "before your allowed to create a connection with the same tuple, all the packets belonging to previous incarnations of that tuple will be dead". Since segments received (apart from SYN under specific circumstances) while a connection is either in TIME-WAIT or no longer existing would be discarded, why not close the connection right away? Q1: Is it because there is less processing involved in dealing with segments from old connections and less processing to create a new connection on the same tuple when in TIME-WAIT (i.e. are there performance benefits)? If the above explanation doesn't stand, the only reason I see the TIME-WAIT being useful would be if a client sends a SYN for a connection before it sends remaining segments for an old connection on the same tuple in which case the receiver would re-open the connection but then get bad segments and and would have to terminate it. Q2: Is this analysis correct? Q3: Are there other benefits to using TIME-WAIT? SOME PRACTICE I've been looking at the munin graphs on a production server that I administrate. Here is one: As you can see there are more connections in TIME-WAIT than ESTABLISHED, around twice as many most of the time, on some occasions four times as many. Q4: Does this have an impact on performance? Q5: If so, is it wise/recommended to reduce the TIME-WAIT value (and what to)? Q6: Is this ratio of TIME-WAIT / ESTABLISHED connections normal? Could this be related to malicious connection attempts?

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  • How can I recover [data from] my failing USB key?

    - by moe37x3
    I have a Corsair Flash Voyager USB key, and it's almost completely failed. When I plug it into my [WinXP] computer, the OS mounts it and open up explorer to the drive's root directory. However, if I try to copy any data off, I get an error message saying that the device is not there. If I leave it plugged in, the OS seems to oscillate between seeing it and not seeing it, since the "Safely Remove Hardware" tray icon appears and disappears every few seconds. The damage was probably caused by my abuse, either from plugging it in with my keys hanging off of it or from losing the cap and keeping it in my pocket uncapped. Is there anything I can do to save the data from it or even rehabilitate the drive?

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  • How reliable is HDD SMART data?

    - by andahlst
    Based on SMART data, you can judge the health of a disk, at least that is the idea. If I, for instance, run sudo smartctl -H /dev/sda on my ArchLinux laptop, it says that the hard drive passed the self tests and that it should be "healthy" based on this. My question is how reliable this information is, or more specifically: If according to the SMART data this disk is healthy, what are the odds of the disk suddenly failing despite this? This assumes the failure is not due to some catastrophic event that impossibly could have been predicted, such as the laptop falling down on the floor causing the drive heads to hit the disk. If the SMART data does not say the disk is in good shape, what are the odds of the disk failing within some amount of time? Is it possible that there will be false positives and how common are these? Of course, I keep backups no matter what. I am mostly curious.

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  • Performance Monitor (perfmon) showing some unusual statistics

    - by Param
    Recently i have thought to used perfmon.msc to monitor process utilization of remote computer. But i am faced with some peculiar situation. Please see the below Print-screen I have selected three computer -- QDIT049, QDIT199V6 & QNIVN014. Please observer the processor Time % which i have marked in Red Circle. How it can be more than 100%.? The Total Processor Time can never go above 100%, am i right? If i am right? than why the processor time % is showing 200% Please let me know, how it is possible or where i have done mistake. Thanks & Regards, Param

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  • OpenGL support no longer available

    - by Aznfin
    I've been using OpenGL hardware acceleration in programs such as Adobe Photoshop CS4 and Adobe After Effects CS4. I've noticed that recently the options for OpenGL previews are disabled because my graphics card seems to not support OpenGL. But that doesn't make any sense whatsoever. I know for a fact that my graphics card does have support for OpenGL and it worked before. I checked for driver updates just the other day. Anybody know what's going on? Info: Operating System: Windows 7 Home Premium 64-bit GPU: ATI Radeon HD 3200 Driver Packaging Version: 8.69-091211a-094296C-ATI Catalyst™ Version: 09.12 Provider: ATI Technologies Inc. 2D Driver Version: 8.01.01.994 2D Driver File Path: /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/CLASS /{4D36E968-E325-11CE-BFC1-08002BE10318}/0000 Direct3D Version: 8.14.10.0723 OpenGL Version: 6.14.10.9252 Catalyst™ Control Center Version: 2009.1211.1547.28237

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  • Error: "The drive is not ready for use; its door may be open."

    - by TimTim
    On Windows Vista SP2 - I'm attempting to upgrade to Windows 7. After I put in the Windows 7 DVD in the drive, I receive the Windows 7 upgrade splash screen (so the drive is working at this moment). But then when I click "Upgrade to Windows 7", I receive a error message stating: Error: The drive is not ready for use; its door may be open Any ideas what's causing this error? Since receiving the error, I have already replaced the DVD drive with a brand new one and still receive the same error. I've also checked Device Manager and no hardware is reporting problems (no cautions or failures).

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  • How to calculate time spent for Linux system administration?

    - by Jaakko
    I would love figuring out how much time I actually have spent in shell performing administrative duties. For billing of course, this information is not sufficient, but it would be helpful to figure out how much time I have actually spent in shell. My question is: How anyone got tips on how to calculate time spent in shell (in hours + minutes), let's say per user account? Could anyone recommend a software that could be used to analyze this time? Optionally I would like to know about ways how to categorise time spent (e.g. 1 hour for Apache, 2 hours for Samba, etc.) Also, your takes on how you monitor your admin time, are also much appreciated! To narrow down the problem, I am specifically interested in ways of tracking time spent in shell for Linux system administration

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  • Micro sound breaks/interrupts on Windows 7

    - by cand
    Hello all, I've been experiencing strange behavior recently. When listening to mp3 or watching movie or whatever that uses sound, I get micro breaks in sound. It's like it hangs or cuts a fragment for about 0.5s. When I start OS, it's ok, but as time passes it gets worse, to the extent that music is unlistenable being interrupted every 2 seconds. I haven't found any relevance between this behavior and hardware usage, I don't think it's directly related to HDD (or it might be but with significant delay). I have updated soundcard drivers and it didn't help a lot. My system is Windows 7, computer is simple HP laptop, nx7300-Ru374ES with WD Caviar Scorpio Blue hard drive inside and integrated soundcard on it (I can check the model later if it's important). Did anybody encounter such problem ? Maybe it's a common thing on Windows 7 or someone knows how to solve it? Thanks in advance.

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  • Monit can't detect MySQL, but I can

    - by Matchu
    Monit is configured to watch MySQL on localhost at port 3306. check process mysqld with pidfile /var/lib/mysql/li175-241.pid start program = "/etc/init.d/mysql start" stop program = "/etc/init.d/mysql stop" if failed port 3306 protocol mysql then restart if 5 restarts within 5 cycles then timeout My application, which is configured to connect to MySQL via localhost:3306, is running just fine and can access the database. I can even use MySQL Query Browser to connect to the database remotely via port 3306. The port is totally open and possible to connect to. Therefore, I'm pretty darn certain that it's running. However, running monit -v reveals that Monit cannot detect MySQL on that port. 'mysqld' failed, cannot open a connection to INET[localhost:3306] via TCP This happens consistently, until Monit decides not to track MySQL anymore, as configured. How can I begin to troubleshoot this issue?

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  • Which network management system (NMS) to choose?

    - by QrystaL
    I need to integrate NMS in large enterprise system for data collection purposes. Primary requirements: collection by SNMP great scalability (up to 1,000 devices with 1,000 interfaces each) failover data storage in Oracle DBMS integration API (configuration, data access) Any ideas would be appreciated...

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  • Nagios simple dashboard

    - by Thomas
    I am looking for a dead simple dashboard for Nagios so our IT team can view the status of our services. In an old version of what's up gold, it was a nice dashboard with different rectangular shape being red, yellow or green depending on the status of the service and could be display easily on a screen. Is there some copycat dashboard for nagios ? any better recommendation ? I want something you can see from your desk 15meters away: red or green, no need for details.

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  • Why does ganglia think my host is down?

    - by NZKoz
    I have ganglia set up to monitor our staging server, it's working great but I'm confused by the definition of 'down' to ganglia. There's a single node, running gmetad, gmond and the web frontend, but some small percentage of the time the web frontend shows some confusing output. Despite the fact that it's a single server in the cluster, and that server is the one serving the web interface, the dashboard output insists that the host is down. Then below that it has a graph which shows 50% down, 50% up. You can see an example of this here: http://i.imgur.com/MCWaS.jpg There's obviously something confusing ganglia somewhere, but I'm not sure where to start looking. Unfortunately googling for any combination of 'ganglia' 'down' 'metric name' seems return nothing but other people's ganglia installations displaying the same nonsense. Any tips on where to start looking would be greatly appreciated

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  • Is there a program to show programs loading during the boot process in real time?

    - by Gary M. Mugford
    Hi all, There are any number of programs that will show me WHAT will run during the boot process for Windows XP. I've always been partial to Mike Lin's version but there are several others, some of which are quite possibly superior. That's not the issue. What I'd really like is a program that would load first and then would list the programs that were about to load and then check them off as the programs loaded. This isn't something I necessarily need for myself. But certain family members get click happy as soon as they see the icon they eventually want to run and end up clicking on it. THIRTY TWO TIMES in one memorable crash-inducing spasm. If there was some way for 'progress' to be shown during the loading of from the various spots Windows auto-loads from, PLUS a BIG BANNER saying "Please do not move the mouse or click on anything until done.", I think I might cut down on my early morning family support calls significantly. I've tried a variety of searches, but I couldn't find the ones that show in real time in the forest of links to programs that will show the list after the fact. Any leads? If not, do any of you who write the after-the-fact listers want to take a shot at producing a utility to do what I think would be a relatively popular utility? Best of the season to all of you and yours. Thanks in advance for any replies, GM

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  • How to approach taking a very diverse hybrid network and making something lean and cohesive

    - by Gregg Leventhal
    I am going to have an opportunity (from the role of Linux Sysadmin) to work on optimizing a corporate server network that has a lot of different application servers from LAMP stacks to JBOSS to IIS based ASP/.NET systems of all sorts. I am interested to hear how you would approach evaluating and consolidating a network in a situation like this where you are walking in cold? What are some of your go-to techniques?

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  • How to get email notification when process on ubuntu screen stopped?

    - by Manoj2411
    I have a application running on Ubuntu 12.04.2 LTS and I am running an application server like mailman server or faye server on ubuntu screen. The problem is, at times the process that is running on screen gets stopped and my application crashes because of that. Now I want to be notified whenever that 'faye server' or 'mailman server' is stopped that is running on screen. I am using Digital Ocean and I have already setup postfix server.

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  • Complete stack traces from Hyperic

    - by Mike Kushner
    I've setup Hyperic to run on our CI-machine, and every once in a while it reacts to some random stack trace and sends of an alert. So far so good, we've caught a lot of intermittent bugs that way. My only issue is that the alert only contains the first error line and not the entire stack trace, which requires me to access the machine and look at the logs manually. Is there any way to modify the alert message to contain more information, alternatively to include the log file in the alert mail?

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