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  • backlinks: Two domains with same IP

    - by Michal
    I run several different web pages on different servers (with different IP addresses). These pages are linking to each other in order to boost number of back links pointing to my pages. I would like to move all those projects to a single virtual host (with a single IP address). My question is, how google handles links within different domain names but same ip address. Is there some penalization for it? Could this lead to lower page rank?

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  • How To Setup Domain Name for SchoolTool Local Server

    - by zeroseven0183
    I am currently testing SchoolTool 2.0 and I would like to do some things: This application is installed on a virtual machine running Ubuntu Server 11.10 bridged to our home network. The site is accessible through IP address. What I would like to do is setup a local domain, say schooltool.ourhomedomain.com. I thought my sister would appreciate it more if it were not via IP address. If there's anymore information needed, let me know. Thanks in advance!

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  • VirtualBox sous Linux, un tutoriel pour apprendre à utiliser le logiciel de virtualisation

    Bonjour,Je vous présente un tutoriel sur l'utilisation de virtual box sous linux : Citation: VirtualBox est un logiciel de virtualisation de systèmes d'exploitation. En utilisant les ressources matérielles de l'ordinateur (système hôte), VirtualBox permet la création d'un ou de plusieurs ordinateurs virtuels dans lesquels s'installent d'autres systèmes d'exploitation (systèmes invités).Les systèmes invités fonctionnent en même temps que le système hôte, mais seul ce dernier a accès directement...

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  • where are apt-get files stored?

    - by loolooyyyy
    i have an ubuntu with three virtual machines running inside running ubuntu also i update the host using apt-get update but i can update VM's, it takes a long time + uses a lot of bandwith which i'm running out of,i want to transfer the updated files by apt-get to VMs, could you please tell me where are they? i'm not talking about the packages themselves stored in /var/cache/apt/archives, i want the file that stores list of available packages on mirror i have selected, thanks lot ps: i know this question has been asked somewhere but i cant find it!

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  • Application stuck in TCP retransmit

    - by SandeepJ
    I am running Linux kernel 3.13 (Ubuntu 14.04) on two Virtual Machines each of which operates inside two different servers running ESXi 5.1. There is a zeromq client-server application running between the two VMs. After running for about 10-30 minutes, this application consistently hangs due to inability to retransmit a lost packet. When I run the same setup over Ubuntu 12.04 (Linux 3.11), the application never fails If you notice below, "ss" (socket statistics) shows 1 packet lost, sk_wmem_queued of 14110 (i.e. w14110) and a high rto (120000). State Recv-Q Send-Q Local Address:Port Peer Address:Port ESTAB 0 12350 192.168.2.122:41808 192.168.2.172:55550 timer:(on,16sec,10) uid:1000 ino:35042 sk:ffff880035bcb100 <- skmem:(r0,rb648720,t0,tb1164800,f2274,w14110,o0,bl0) ts sack cubic wscale:7,7 rto:120000 rtt:7.5/3 ato:40 mss:8948 cwnd:1 ssthresh:21 send 9.5Mbps unacked:1 retrans:1/10 lost:1 rcv_rtt:1476 rcv_space:37621 Since this has happened so consistently, I was able to capture the TCP log in wireshark. I found that the packet which is lost does get retransmitted and even acknowledged by the TCP in the other OS (the sequence number is seen in the ACK), but the sender doesn't seem to understand this ACK and continues retransmitting. MTU is 9000 on both virtual machines and througout the route. The packets being sent are large in size. As I said earlier, this does not happen on Ubuntu 12.04 (kernel 3.11). So I did a diff on the TCP config options (seen via "sysctl -a |grep tcp ") between 14.04 and 12.04 and found the following differences. I also noticed that net.ipv4.tcp_mtu_probing=0 in both configurations. Left side is 3.11, right side is 3.13 <<net.ipv4.tcp_abc = 0 <<net.ipv4.tcp_cookie_size = 0 <<net.ipv4.tcp_dma_copybreak = 4096 14c11 << net.ipv4.tcp_early_retrans = 2 --- >> net.ipv4.tcp_early_retrans = 3 17c14 << net.ipv4.tcp_fastopen = 0 >> net.ipv4.tcp_fastopen = 1 20d16 << net.ipv4.tcp_frto_response = 0 26,27c22 << net.ipv4.tcp_max_orphans = 16384 << net.ipv4.tcp_max_ssthresh = 0 >> net.ipv4.tcp_max_orphans = 4096 29,30c24,25 << net.ipv4.tcp_max_tw_buckets = 16384 << net.ipv4.tcp_mem = 94377 125837 188754 >> net.ipv4.tcp_max_tw_buckets = 4096 >> net.ipv4.tcp_mem = 23352 31138 46704 34a30 >> net.ipv4.tcp_notsent_lowat = -1 My question to the networking experts on this forum : Are there any other debugging tools or options I can install/enable to dig further into why this TCP retransmit failure is occurring so consistently ? Are there any configuration changes which might account for this weird behaviour.

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  • SEO - The How and Why

    As the influence of social networking sites and the internet increases, focus of mankind is slowly shifting from real life to the virtual space and why not, it's fun, dynamic and cheap. So it wasn't long before businesses started recognizing the importance of online advertising.

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  • EMC VPlex Buyer's Guide

    With its recent release of VPlex, EMC is anything but quiet about its private cloud vision. At EMC World earlier this month, it elaborated on tis plans to go the distance with virtual storage.

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  • EMC VPlex Buyer's Guide

    With its recent release of VPlex, EMC is anything but quiet about its private cloud vision. At EMC World earlier this month, it elaborated on tis plans to go the distance with virtual storage.

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  • Web Development Services - What's the Need?

    With the each passing day, Internet is becoming more and more popular and everyone wanting to have a strong online presence. The long established brick-and-mortar businesses have switched to virtual storefronts. Those who haven't done as yet, would soon face extinction.

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  • How can i turn a virtualbox disk partion to be my main boot system? (read description)

    - by user75975
    I recently had windows xp installed on my pc and chose to try ubuntu but i did a full install with ubuntu. I luckily chose to create a backup windows iso before the install and now want to reinstall windows but i couldnt find a sufficient program to mount the iso to my cd disk. My question is how can i burn the disk using VirtualBox or even how can i transform a virtual box partion to my main OS system?? thx in advance

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  • Argument on Ranking of SEO Links

    SEO and link building can be a marketing tool considering the fact that the amount of traffic a site generates is a direct outcome of the links it has been given by the owner. Committed Link building is very essential for good standing of a virtual address.

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  • I upgraded ubuntu to 12.10, and the internet does not work on vbox

    - by user100607
    Last week, I upgraded my operating system to Ubuntu 12.10 from 12.04, and the internet stopped working on two virtual machines (launched with virtualbox), Windows XP and OSX Snow Leopard. OSX also stopped working completely at first, but I fixed that by switching to the 64 bit option in the vbox settings. I switching to bridged networking from NAT restored the internet to Windows, but not to OSX. Does anybody know what I could be doing wrong?

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  • Unity --reset in 12.04 doesn't work

    - by Darr247
    I was trying to disable the 'global menu' feature in Unity, and Unity began to malfunction. I was unable to move windows, the left menu bar had disappeared, and the top panel was also gone. I couldn't open a terminal as I couldn't move windows to get to my shortcut. I used a virtual terminal(tty2), logged in, used sudo, and executed # unity --reset but it never finished. I have pasted the output here

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  • CentOS Goes Commercial

    <b>Linux Planet:</b> "The market for CentOS Linux-based appliances continues growing, thanks in part to a new network-monitoring virtual appliance from GroundWork and commercial support services from OpenLogic."

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  • Report: CentOS Goes Commercial

    The market for CentOS Linux-based appliances continues growing, thanks in part to a new network-monitoring virtual appliance from GroundWork and commercial support services from OpenLogic.

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  • Is it possible to dual boot Mac OSX Lion with Ubuntu 12.04?

    - by tofu_bacon
    I've read that it can be dangerous for your computer to try to run Ubuntu and that the safest option is to run it on an external hard drive. Is this true? (I don't want to run it through a Virtual Machine.) I would prefer to dual boot it, given that my hard drive has so much space. Update: So does this mean that even if I have Ubuntu installed, that my data would still be at risk due to, say, stability issues?

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  • ID?????????

    - by ???02
    ID?????????ID?????????????????????ID??(IDM)?????????????????????ID?????????????????????????????????????:ID????????????????????:ID???????????????????????????????:ID????????????????????????????????????????????????????????????????????????????????????????????????? ???ID?????????????????????????????????????????????ID????????????????????????????? ID????????????ID??????????????3?????????ID??????????????????????????????????????????????????????????/????????·??·?????????????????????????/?????????????????????/???????????????????????????/?????????????????????????????????????·????????????????????????4????????????????????????????????????Oracle Identity and Access Management Suite?????????ID????????????????????????ID????????????????????????Oracle Identity Manager????????????????????????????????Oracle Role Manager ??????????????????????ID???????????????????????????????????????????????????????????????????????????????·?????????????????????????????·???????????????????????????????????????????????Oracle Internet Directory?Oracle Virtual Directory???2?????????·??????????????????????????(????·????????????????)???????????????????????????????????????????????????????????????????????? ??????????·??????????????????????????????????????Web?????·?????????????? ????????????????????????????????????????????·??????????????????????????????ID????????·??????ID?????????????????????????????????????????????????????????????????????????????????????????????·???????ID???????????????????????????????ID???????????????????ID?????????????????????????????????????????????????????????????????????????????? ?????? Oracle Direct

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  • Problem displaying custom error page in ASP.NET MVC 2

    - by robert_d
    This is customErrors section from my web.config file <customErrors mode="On"> <error statusCode="500" redirect="HTTP500.aspx" /> </customErrors> HTTP500.aspx is the same as standard /Views/Shared/Error.aspx page. When I get HTTP 500 error I see this page: Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed. Details: To enable the details of this specific error message to be viewable on the local server machine, please create a tag within a "web.config" configuration file located in the root directory of the current web application. This tag should then have its "mode" attribute set to "RemoteOnly". To enable the details to be viewable on remote machines, please set "mode" to "Off". Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's configuration tag to point to a custom error page URL. But when I change the above customErrors section like this: <customErrors mode="On"> <error statusCode="500" redirect="HTTP500.htm" /> </customErrors> then HTTP500.htm page is displayed when HTTP 500 error occurs. Why HTTP500.aspx page isn't displayed?

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  • Spring Framework 3 and session attributes

    - by newbie
    I have form object that I set to request in GET request handler in my Spring controller. First time user enters to page, a new form object should be made and set to request. If user sends form, then form object is populated from request and now form object has all user givern attributes. Then form is validated and if validation is ok, then form is saved to database. If form is not validated, I want to save form object to session and then redirect to GET request handling page. When request is redirected to GET handler, then it should check if session contains form object. I have figured out that there is @SessionAttributes("form") annotation in Spring, but for some reason following doesnt work, because at first time, session attribute form is null and it gives error: org.springframework.web.HttpSessionRequiredException: Session attribute 'form' required - not found in session Here is my controller: @RequestMapping(value="form", method=RequestMethod.GET) public ModelAndView viewForm(@ModelAttribute("form") Form form) { ModelAndView mav = new ModelAndView("form"); if(form == null) form = new Form(); mav.addObject("form", form); return mav; } @RequestMapping(value="form", method=RequestMethod.POST) @Transactional(readOnly = true) public ModelAndView saveForm(@ModelAttribute("form") Form form) { FormUtils.populate(form, request); if(form.validate()) { formDao.save(); } else { return viewForm(form); } return null; }

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  • Dynamically creating an ImageMap (clickable area on image) in WPF using codebehind.

    - by Thomas Stock
    Hi, I'm trying to create "imagemaps" on an image in wpf using codebehind. See the following XML: <Button Type="Area"> <Point X="100" Y="100"></Point> <Point X="100" Y="200"></Point> <Point X="200" Y="200"></Point> <Point X="200" Y="100"></Point> <Point X="150" Y="150"></Point> </Button> I'm trying to translate this to a button on a certain image in my WPF app. I've already did a part of this, but I'm stuck at setting the Polygon as the button's "template": private Button GetAreaButton(XElement buttonNode) { // get points PointCollection buttonPointCollection = new PointCollection(); foreach (var pointNode in buttonNode.Elements("Point")) { buttonPointCollection.Add(new Point((int)pointNode.Attribute("X"), (int)pointNode.Attribute("Y"))); } // create polygon Polygon myPolygon = new Polygon(); myPolygon.Points = buttonPointCollection; myPolygon.Stroke = Brushes.Yellow; myPolygon.StrokeThickness = 2; // create button based on polygon Button button = new Button(); ????? } I'm also unsure on how to add/remove this button to/from my image, but I'm looking into that. Any help is appreciated.

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  • ASPNET MVC - Override Html.TextBoxFor(model.property) with a new helper with same signature?

    - by JK
    I want to override Html.TextBoxFor() with my own helper that has the exact same signature (but a different namespace of course) - is this possible, and if so, how? The reason for this is that I have 100+ views in an already existing app, and I want to change the behaviour of TextBoxFor so that it outputs a maxLength=n attribute if the property has a [StringLength(n)] annotation. The code for automatically outputting maxlength=n is in this question: http://stackoverflow.com/questions/2386365/maxlength-attribute-of-a-text-box-from-the-dataannotations-stringlength-in-mvc2. But my question is not a duplicate - I am trying creating a more generic solution: where the DataAnnotaion flows into the html automatically without any need for additional code by the person writing the view. In the referenced question, you have to change every single Html.TexBoxFor to a Html.CustomTextBoxFor. I need to do it so that the existing TextBoxFor()'s do not need to be changed - hence creating a helper with the same signature: change the behaviour of the helper method, and all existing instances will just work without any changes (100+ views, at least 500 TextBoxFor()s - don't want to manually edit that). I tried this code: (And I need to repeat it for each overload of TextBoxFor, but once the root problem is solved, that will be trivial) namespace My.Helpers { public static class CustomTextBoxHelper { public static MvcHtmlString TextBoxFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, object htmlAttributes, bool includeLengthIfAnnotated) { // implementation here } } } But I am getting a compiler error in the view on Html.TextBoxFor(): "The call is ambiguous between the following methods or properties" (of course). Is there any way to do this? Is there an alternative approach that would allow me to change the behaviour of Html.TextBoxFor, so that the views that already use it do not need to be changed?

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