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• Make logwatch reports more interesting?

  - by Alexander Shcheblikin

  Is it possible to improve the quality of reports from logwatch? Like make it not just report disk usage which doesn't even change much in daily operation, but report significant changes in usage or approaching critical capacity levels? If I cannot do that with logwatch and instead have to write custom scripts to produce such reports, logwatch appears to be pretty useless, or even dangerous, as many users reportedly grow to ignore emails from it knowing they are so boring.

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• How can I monitor VNC via Nagios?

  - by atroon

  I have a number of remote sites which have VNC running on a few computers for support purposes. They are (obviously) only available on our internal network. I am using Nagios to keep track of all the systems in the network and I want to have it check to make sure the VNC server is running on the appropriate hosts. There is a 'check_vnc' plugin available here but it relies on VNC Snapshot which I don't want to use. Certainly I could use it, but it adds more complexity and dependency, which I want to avoid. It seems simpler to just use check_tcp to make sure I get the proper response to a connection request for VNC, e.g. port 5900, send a connect string, get back framebuffer info. My real question, I suppose, is this: What is the 'proper' generic connect string for VNC (I use both UltraVNC and RealVNC) and what is the expected response? If it's really easier to use the VNC Snapshot and check_vnc, let me know. I just can't imagine that a string of text isn't easier, faster, and less bandwidth intensive to monitor.

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• Minimum Requirements for (open) Solaris?

  - by Electrons_Ahoy

  I'm thinking about knocking together a Solaris box at home to act as a combination server and learning exercise. What are the minimum hardware specs I can throw at it such that it'll be actually usable? I'd be cobbling the machine together from a stack of various x86 PC spares/leftovers. Does anyone have experience with Solaris at the lower end of the spectrum? The Sun site, for example, claims it'll run with as little as 255 megs of ram, but is it worth the exercise with less than a gig? Will my old Pentium II 450 cut the mustard? (I'm willing to throw a couple of bucks at pricewatch/mwave/newegg on this, but if I need to build a better rig than my main PC, I may not bother.)

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• SCSI driver installation trouble

  - by Vicky

  I tried to install the driver of Adaptec 39320A-Ultra 320 SCSI card in Win2003 Server R2 SP2 in a DELL PowerEdge 2950 Server. I selected the driver from the list of drivers present in windows. But it says that the device could not be started(Code 10). I tried to put the card in a system that already had the driver installed. It worked fine. So there is no problem with the hardware. I even tried downloading the driver from the manufacturer website. When I try to select install from path and install that driver, it tell no matching driver found. When I install the default driver from windows, it shows the card in SCSI group of device manager, but with an ! symbol. Also the device ID in driver details was different from that of the one present in other system where it insalled fine. Any suggessions to solve it?

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• Good free software to track and graph memory and CPU usage on Windows?

  - by TheLQ

  There are many questions on Linux memory tracking, but I haven't seen any for Windows. In my case however its a Windows XP Pro box I need to track the memory and CPU usage of. The reason I need it is due to a server program I'm trying that is eating all my processor and some of my memory which is freezing my RDP session and System Explorer and even makes it difficult to login physically. As this is a very constrained server I'm working off of (768 MB RAM with Pentium 4 which disappears with this program), I need a program that doesn't run/require a webserver. I can give it a MySQL database if necessary however. Is there any suggestions for such a program?

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• Need an alerting system if my cloning script fails

  - by rahum

  I've configured a nightly rsync to mirror one server to a standby offsite backup server. The total datastore on the primary is 1.5TB. In the course of getting this working, I ran into numerous instabilities with the environment, which I seem to have sorted out, but even though it's now working, I am still nervous. This is intended to be a disaster-scenario standby server, and if disaster strikes and the standby does not have all the proper data synchronized, I'm out of a job. Thus, I want to script a system that will confirm, after each nightly sync, that the destination data matches the source. I realize that rsync does this, but if rsync doesn't complete fully (which was happening during the setup troubleshooting), I need to know. Any suggestions? I'm best with Ruby, if that is relevant for the solution.

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• How to make a persistent acknowledgment in Icinga/Nagios?

  - by blerontin

  I am using Icinga (Nagios fork) to also monitor uptime of external hosts and services. Currently when looking at the "Critical" count I find it difficult to decide if an internal service is affected (I should take immediate action) or an external service (I just acknowledge the problem). Is there a way to keep a problem acknowledgement for future down-times of the checked host/service? Is there some way to auto-acknowledge the state change of external hosts/services?

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• Best way to monitor host

  - by Axle

  I have just set up a host which receives messages from 300b to 1500b (wrapped stx etx)and replies with the same. It works fine but some times it receives junk data. Is there anyway to monitor this out of band data just so we can make sure we are not receiving massive amounts of it. Also is it possible to monitor if connections time out - where the host did not reply in time or long connections where it takes the host 20 seconds to reply when it normally takes 5. I am aware of IP monitor but I don't think it covers enough - Is there anything else or any other way? Thanks in advance!

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• tcp handshake failed.client send rst (after syn-ack). can any one advice?

  - by user1495181

  architecture: 2 linux computer connected . on the second (192.168.1.1) one run apache server . I have a small program that take tcp packets from nfqueue change the dst ip to 192.168.1.1 in case that the dst ip is 192.168.1.2 (i know that i can do it with iptables , but my program will do more things in the future), fix check sum and return to the queue. if i call to telnet 192.168.1.1 , means that my program dosnt need to do any manipulation, handshake is OK. If i call to telnet 192.168.1.2 , my program change the dest. server get the syn and return syn-ack, but right after getting the syn-ack the client send rst. Can anyone advice? wireshark of the telnet tcpdump of the telenet above

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• Can you suggest some DIY PC specs for 1) Value, and 2) Future 'upgradability'?

  - by user17381

  Hi, I'm considering building a new desktop PC from components. For the last 7/8 or so years I have almost exlusively used laptops, and so have fallen behind a bit with knowledge of various hardware technologies. Anyway, now I'm considering building a new desktop machine. Mainly for development work, but also would be nice to do a bit of gaming. The two main criteria are: I would like the first build to be relatively low cost. I would like to select components that will allow me to upgrade in the future without throwing too much away. Can anyone recommend a setup? Thanks

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• Monitor a process on linux

  - by steve

  Hi, I'd like to get an overview of resource usage of one particular process running on a ubuntu server. Can anyone tell me how I'd go about doing that. Thanks

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• Reporting memory usage per process/program

  - by Nick Retallack

  How can I get the current memory usage (preferably in bytes so they can be added up accurately) for all running processes individually? Can I roll up the summaries for child processes into the process that spawned them? (e.g all apache threads together). Sometimes, my server runs out of memory and becomes unresponsive. I want to discover what is using up all the memory. Unfortunately, it's likely to not be a single process. Some programs spawn hundreds of processes, each using very little memory, but it adds up. On a side note, is it normal for apache to spawn 200+ processes?

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• Unable to create a Windows 7 system image of a failing hard drive

  - by Rahul

  The hard disk of my one year old T400 Thinkpad has started failing periodic hardware tests. I get a "Targeted Read Test Failed" error. The "SMART short self test" times out. I am now trying to create a Windows 7 System image of the hard disk but it fails without giving any specific error messages. I tried using Comodo Backup but got an error (code 101117) there as well. I have copied the important files in Dropbox but would like to take a full System backup as I have plenty of software installed on the machine. Does anyone know why this is happening and how I can take a backup of the system image ?

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• Using runit and monit to run / monitor services

  - by murtaza52

  I am configuring some services to run on Ubuntu server. I was going through the link below where they use runit to run the services and monit to monitor the services - http://rubyworks.rubyforge.org/manual/monit.html http://rubyworks.rubyforge.org/manual/runit.html 1) The services are all started through monit. 2) Monit inturn starts them using runit. What is the advantage of using the above setup, where the services are run using runit via Monit. Why use runit in the middle, instead of directly starting them with monit?

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• PC is randomly shutting off

  - by Bobby

  I have a PC which is randomly shutting off (the hard way, like someone pulled the plug). It's no heat problem, because this can happen after 2 minutes of operation or after 4 hours and I checked the temperature. It's also no problem of the operation system, because it will also do that while in BIOS. If it happens once, you can be sure that it will happen within the next hour another two or three times, and then it works again for over a week or even longer. Possible causes I've thought about so far are: Voltage Fluctuation Loose contact (already replugged all cables within the PC, no luck) Faulty PSU Maybe someone has more ideas to this? P.s.: I don't have the hardware specs with me right now, I'll post them as soon as I get them.

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• Recurring network issues the same time every day.

  - by Peter Turner

  Something has been happening on my company's network at 9:30 every day. I'm not the sysadmin but he's not a ServerFault guy so I'm not privy to every aspect of the network but I can ask questions if follow up is needed. The symptoms are the following : Sluggish network and download speed (I don't notice it, but others do) 3Com phones start ringing without having people on the other end. We've got the following ports exposed to the public for a web server, a few other ports for communicating with our clients for tech support and a VPN. We've got a Cisco ASA blocking everything else. We've got a smallish network (less than 50 computers/vms on at any time). An Active Directory server and a few VM servers. We host our own mail server too. I'm thinking the problem is internal, but what's a good way to figure out where it's coming from?

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• Testing performance from around the world - how do I get a linux shell easily in multiple countries?

  - by Matthew O'Riordan

  We are building a socket based service where latency is paramount, and as such we have servers distributed into 7 data centres around the world. However, whilst we know we're bringing the servers closer to the clients, it's very difficult to know how effective this is, and importantly, what difference this makes compared to our competitors. As such, we want to run simple scripts that test latency and throughput for both our service and our competitors, which is easy enough using Amazon, however Amazon only have 7 data centres. We would like to know for example how we perform in locations all over the world such as South Africa, Australia, China, Peru etc. Does anyone know of any service where we could piggy back off their global infrastructure and run some scripts to test this performance? The obvious contenders are people like Monitis, but I don't think they would allow us to run custom scripts, only standard protocol monitors. Thanks for your help. Matt

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• Measuring performance indicators on a cluster

  - by Aditya Singh

  My architecture is based on Amazon. A ELB load balancer balances POST requests among m1.large instances. Every instance has a nginx server on port 80 which distributes the requests to 4 python-tornado servers on backend which handle the request. These tornado servers are taking about 5 - 10ms to respond to one request but this is the internal compute time of every request. I want to put this thing on test and i want to measure the response time from ELB to upstream and back and how does it vary when the QPS throughput is increased and plot a graph of Time vs. QPS vs. Latency and other factors like CPU and Memory. Is there a software to do that or should i log everything somewhere with latency checks and then analyze the whole log to get the stuff out. I would also need to write a self-monitor which keeps checking the whole response time. Is it possible to do it with a script from within the server. If so, will it be accurate ?

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• Innotop and Monit to kill thread using too much resources

  - by pocesar

  Instead of restarting the whole MYSQL process, sometimes I just want to kill the offending thread instead of making everything go down. Usually the spike in CPU is when a bot is crawling the first pages of pagination of my site (over 70.000 paginated results, 45 items per page). Is there a way I could do this automatically using monit and innotop? I couldn't find relevant information on Google, that's why I'm asking here. If these two tools aren't par to the task, which ones should I use?

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• What's a good tool for checking from my own machine that my server is up?

  - by chico

  I'm looking for a good tool (web site or not) that I can use to do a simple check whether my web server is accessible from outside LAN (it's serving in a non-standard port). To give some context, I've gone through this problem: can't access my ip from outside. Even the tools I've found are not really working. Currently to fetch the html I serve with the online bash tool I do: curl <my ip>:<my port> \ | sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g; s/"/\&quot;/g; s/'"'"'/\&#39;/g' I'm looking for a simple tool that can display the html properly, or just show raw text without resorting to sed html escaping and curl.

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• latency, regular alternations. Pfsense, network

  - by Tillebeck

  Any idea why grapgh is a shown? It i two pfsense boxes and I have not looked into where they ping to and if it is related to the server they ping. Trafic graphs are following a normal 24 hour cycle and not related to either of the latency graphs Img1: High frequent ulteration in latency. Just started a few days back. Peaks are not perfectly regular but varies from 40min to 1hour Img2: This is a different router on another internet connection. Most of our routers shown this kind of latency graphs - so for our setup it is "normal". Please note that second graph is for a whole week and not just some hours

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• Monit checking URL follow redirects

  - by beck

  I am looking to use monit to keep an eye on my site. I want it to treat it the site like an external user so am testing the url but it doesn't seem to follow redirects. The content check is being performed on the html of the redirect. #request works: if failed url http://www.sharelatex.com/blog/posts/future.html content == "301" #request fails if failed url http://www.sharelatex.com/blog/posts/future.html content == "actual content" Finding out how to get the url check to follow 30X would be great.

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• task manager for Internet usage, I need to block a software accessing a website/web server

  - by Pennf0lio

  I have a software that accesses a website, I want to monitor what website is it accessing and block that website. Is there a software similar to "windows task manager" that allows you to monitor software that accesses a website? I want to know what website/server is it accessing so I could then block it. And Is there an alternative way to block aside from "host" file? Thanks! FYI: running on Win7

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• Need to know who is hogging my bandwidth?

  - by Dev

  I have an ethernet connection to my iMac and with Internet sharing I am broadcasting the wireless network from my mac rather than using a wireless router. I use it to connect other devices wirelessly to the internet. But this makes all the traffic flow through my iMac. I wanted a way to analyze the traffic so that I know what connected devices are hogging the bandwidth at a given time and from which websites? I installed wireshark for mac and played around a little but it seems like an overkill when you first look at it. Can someone please help with few instructions to get what I need or any other way other than using wireshark? Thanks Dev.

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• Linux NetSec/IDS Bridge

  - by Blackninja543

  What I am looking to make is a linux system that acts as a bridge. It simple forwards any data sent on one device over to the next device. It does not attempt to block incoming attacks or redirect any traffic. What it does to is perform an IDS role on the network. Any suspicious activity is logged and reported. Snort would be one such piece of software however I was wondering what other solutions and ideas the rest of the community has.

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