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• Ubuntu 12.04 desktop, VNC viewer not refreshing screen

  - by user73279

  I've had this issues across multiple machines and multiple versions of Ubuntu desktop (all 10.04 or later). Usually it happens with an old laptop I've put Ubuntu on but now it's happening on my primary dev machine (a quad-core PC recently upgraded to Ubuntu 12.04 desktop). The problem is this - I can connect to the machine and login with the password, the initial screen looks fine but never refreshes. I can see the monitor for the machine across the room and can see the mouse move and the menus pop up but the image of the screen on the PC in front me running the VNC viewer never updates. So the mouse and keyboard commands are working. Ubuntu 12.04 Desktop Ultra VNC Viewer (also seen with RealVNC's free VNC viewer) Desktop Sharing Static IP on eth0; Dynamic ID on eth1 I think it is an Ubuntu config issue because this PC used to work just fine with 9.04, 10.04, and 11.10 (over the past couple of years). I've also had a couple of laptops that used to have this issue with older Ubuntu's but don't with 12.04. Additional info: The Win7 PC I'm trying to use to control the Ubuntu PC is connected via 2 DLink 8-port gigabit routers. The Ubuntu laptop I usually control via VNC is typically only connected to the network via wireless. The screen refresh is choppy but usable. I've repeated the issue on a Win7 laptop which was connected via ethernet and wireless.

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• How to retrieve the value of querystring from url using Javascript

  - by ybbest

  The following is a Javascript function I found on the internet , I keep here just in case I need to use it again. function getParameterByName(name) { name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]"); var regexS = "[\\?&]" + name + "=([^&#]*)"; var regex = new RegExp(regexS); var results = regex.exec(window.location.search); if(results == null) return ""; else return decodeURIComponent(results[1].replace(/\+/g, " ")); } You can also add this method to jquery as below. $.getParameterByName = function (name) { name = name.replace( /[\[]/ , "\\\[").replace( /[\]]/ , "\\\]"); var regexS = "[\\?&]" + name + "=([^&#]*)"; var regex = new RegExp(regexS); var results = regex.exec(window.location.search); if (results == null) return ""; else return decodeURIComponent(results[1].replace( /\+/g , " ")); }; $(document).ready(function () { alert($.getParameterByName("id")); }); References: http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript http://blog.jeremymartin.name/2008/02/building-your-first-jquery-plugin-that.html http://stackoverflow.com/questions/7541218/writing-jquery-static-util-methods http://api.jquery.com/category/utilities/

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• Setting up a externally facing server on Windows. How do i setup DNS/Nameservers?

  - by Jason Miesionczek

  So i have a domain name that i would like to host from my static ip internet connection. I have windows server 2008 r2 installed, and dns setup. The dns server is currently behind a firewall, and i have the appropriate rules to allow traffic to reach it. My question is, what entries do i need to create in the DNS so that i can have some nameservers to use at my domain registrar, so that the domain correctly points to the server? I know that most domains have nameservers like ns1.domain.com, ns2.domain.com, etc. What would i point those to in my DNS?

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• First request too slow even if I have a load balancer in the back

  - by adrian7

  I have an Apache 2 on Centos + bind with a wordpress website on it (e.g example.com). I have also set up, on another server in a different contry a load balancer (varnish:80 + nginx 127.0.0.1:8080) for it - which task is to server all static content under /wp-content/. Using Simple DNS editor I added an A entry to cdn.example.com pointing to the server's IP. So no extra work from a 2nd dns server. Then using htaccess I redirect all requests to jpg|gif|css|js files to cdn.example.com. That works and all files are saved on the "cdn" server and served right away. My problem is that for the first time I enter on example.com (e.g after restarting the computer or closing the browser) the load time is 1 up to 3 seconds, while any subsequent page loads take only 300 to 600 miliseconds. I know it might be a DNS issue, but I have done a cache check on several websites and cdn.example.com indicates the right IP. Do you have any ideas where I should dig to solve this first-time slowness?

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• load balancing two web servers each on two different isp's?

  - by Scott

  I have two ISP's that provide me hosting via apache / php / mysql. I am running drupal on them. On occasion the mysql server will go away (crash), so I was hoping to find a reasonable way to have a fail over, if server A SQL is down, all traffic is sent to server B. I know traditionally this is handled in DNS where a second alternate ip is given if there is a problem - or similar. But I do not have control over the isp, other than I can run php, perl and the usual apache stuff. Also, I have static ip's on each isp, and I can create dns entries (A/CNAME/TXT). So, I was hoping there might be a way for me to have a script that checks if drupal has a problem, and if so, somehow alter dns, or ? Or, any other ideas? (other than spending lots more $ on a better isp)

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• Inbound connections using Internet Connection Sharing in Apple/Mac/Leopard

  - by tlianza

  I have a Mac mini which I'm using to give some other devices wireless access, by sharing it's Airport connection with the local ethernet, and that is plugged into a switch. All devices can get online no problem. (See how: http://www.macosxhints.com/article.php?story=20041112101646643 and http://www.macosxhints.com/article.php?story=20071223001432304 ) The issue is that I need to be able to connect in to these machines as well (at least, for the Slingbox to work). All the devices have 192.168.2.* addresses, and the rest of my local network is on 192.168.1.*. I tried setting a static route so that the 192.168.2.* addresses would use a gateway of 192.168.1.50 (my mac mini's address) but that didn't seem to help. Does anyone know if what I'm trying to do is possible? I admit I'm not certain what Internet Connection sharing is really doing under the hood... perhaps it just does basic nat, and doesn't do the type of routing I'm looking for. If so, anyone know if this is possible?

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• How can I make permanent death in a MUD seem acceptable and fair to players?

  - by Luke Laupheimer

  I have considered writing a MUD for years, and I have a lot of ideas my friends think are really cool (and that's how I'd hope to get anywhere -- word of mouth). Thing is, there's one thing I have always wanted, that my friends and strangers hated: permanent death. Now, the emotional response I get to this is visceral revulsion, every time. I'm pretty sure I am the only person that wants this, or if I'm not, I'm a tiny minority. Now, the reason I want it is because I want the actions of the players to matter. Unlike a lot of other MUDs, which have a set of static city-states and social institutions etc, I want the things my players do, should I get any, to actually change the situation. And that includes killing people. If you kill someone, you didn't send them to time out, you killed them. What happens when you kill people? They go away. They don't come back in half an hour to smack talk you some more. They're gone. Forever. By making death non-permanent, you make death not matter. It would be similar if a climax to a character's arc is getting a speeding ticket. It cheapens it. Non-permanent death cheapens death. How can I: 1) Convince my players (and random people!) that this is actually a good idea?, or 2) Find some other way to make death and violence matter as much as it does in real life (except within the game, of course) sans character deletion? What alternatives are there out there?

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• Cannot SSH into Amazon EC2 instance

  - by edelwater

  I read: Cannot connect to ec2 instance http://stackoverflow.com/questions/5635640/cannot-ssh-into-amazon-ec2-instance Amazon EC2 instance ssh problems etc... But could not fix it: suddenly (after a year of service, no changes on my winscp settings) it gives me "network error connection timed out" (im using ec2-user) (also from the amazon console). Log FILE: http://pastebin.com/vNq6YQvN All Sites that run on it run fine port 22 is allowed (never changed it) (security group) using the correct ec2-user and domain via my winscp / putty i can connect to other hosting (via ssh) update: SOLVED. I spend 2 days without looking at my own IP address .... (since it did not change the past 3 years....). Your comments made the spark in my brain. thank you so much. (and only now i find dozens of discussions from angry users that the static addresses from my provider are changed to dynamic ones: http://gathering.tweakers.net/forum/list_messages/1501005/12 ...)

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• Problem with missing JSON functions on PHP 5.2.6 / Plesk 8.4

  - by Drachenviech

  I have a vserver running openSuse 10.3, Apache 2 and Plesk 8.4. I can update/upgrade neither, as it is apparently not recommended to upgrade openSuse 10.3 (and an update to the EOL 10.4 does not seem to make much sense) and Plesk fails to update no matter what version I try (even fails to upgrade to 8.4.1). Still I can live with that somehow, primarily because I don’t have the time to do a fresh remote install on the vserver. What really is a problem is, that though the installed PHP is 5.2.6 it has no zip library and no json functions. The first is probably because PHP was not compiled with --enable-zip. The second is a big mystery though. As I understand it, it always comes with PHP unless its compiled with the --disable-json configure option. This is however not the case. And the json extension module is just not there. I even tried to enable it with extension=json.so with no luck either. the configure options of my PHP are (as shipped with Plesk 8.4) '../configure' '--prefix=/usr' '--datadir=/usr/share/php5' '--mandir=/usr/share/man' '--bindir=/usr/bin' '--with-libdir=lib' '--includedir=/usr/include' '--sysconfdir=/etc/php5/apache2' '--with-config-file-path=/etc/php5/apache2' '--with-config-file-scan-dir=/etc/php5/conf.d' '--enable-libxml' '--enable-session' '--with-mm' '--with-pcre-regex=/usr' '--enable-xml' '--enable-simplexml' '--enable-spl' '--enable-filter' '--disable-debug' '--enable-inline-optimization' '--disable-rpath' '--disable-static' '--enable-shared' '--program-suffix=5' '--with-pic' '--with-gnu-ld' '--with-system-tzdata=/usr/share/zoneinfo' '--with-apxs2=/usr/sbin/apxs2' '--disable-all' '--disable-cli' As I understand it, PECL is not an option with 5.2.6. Or am I mistaken? Even if I was not, the openSuse repository only goes as far as PHP 5.2.4. The openSuse install even came without zypper, which I had to manually install. So is there a way to get ziplib and json running in PHP 5.2.6 without having to recompile the binary?

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• Best way to mask 2D sprites in XNA?

  - by electroflame

  I currently am trying to mask some sprites. Rather than explaining it in words, I've made up some example pictures: The area to mask (in white) Now, the red sprite that needs to be cropped. The final result. Now, I'm aware that in XNA you can do two things to accomplish this: Use the Stencil Buffer. Use a Pixel Shader. I have tried to do a pixel shader, which essentially did this: float4 main(float2 texCoord : TEXCOORD0) : COLOR0 { float4 tex = tex2D(BaseTexture, texCoord); float4 bitMask = tex2D(MaskTexture, texCoord); if (bitMask.a > 0) { return float4(tex.r, tex.g, tex.b, tex.a); } else { return float4(0, 0, 0, 0); } } This seems to crop the images (albeit, not correct once the image starts to move), but my problem is that the images are constantly moving (they aren't static), so this cropping needs to be dynamic. Is there a way I could alter the shader code to take into account it's position? Alternatively, I've read about using the Stencil Buffer, but most of the samples seem to hinge on using a rendertarget, which I really don't want to do. (I'm already using 3 or 4 for the rest of the game, and adding another one on top of it seems overkill) The only tutorial I've found that doesn't use Rendertargets is one from Shawn Hargreaves' blog over here. The issue with that one, though is that it's for XNA 3.1, and doesn't seem to translate well to XNA 4.0. It seems to me that the pixel shader is the way to go, but I'm unsure of how to get the positioning correct. I believe I would have to change my onscreen coordinates (something like 500, 500) to be between 0 and 1 for the shader coordinates. My only problem is trying to work out how to correctly use the transformed coordinates. Thanks in advance for any help!

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• Windows Firewall rule based on domain name instead of IP

  - by DennyDotNet

  I'm trying to allow a service to a set of machines via Windows Firewall. I'd like to add my home machine to the firewall but my home machine has a dynamic ip address. I use dyndns so that I have a hostname which I can always connect to. So I'm trying to see if there is a way I can use my hostname instead of an IP. Thanks Update Let me add a little more information, perhaps there are other ways to resolve my issue. The server is a web server hosted by RackSpace. I only want to allow RDP access from my work (static IP, so no problem) and home (dynamic). My home IP doesn't change too often, just often enough to annoy me. So maybe there is a better way to do this... maybe VPN?

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• Airpot Express configuration

  - by Christina

  We are trying to set up remote access to a computer that houses a server fro a particular program we are running. The program says we need to configure the office router. In the firewall settings it says to open ports 5345-5351 (TCP only). Port Forwarding: You will also need to forward the same range of ports (5345-5351) to the computer running the Server. This typically requires that the computer running the Server be assigned a static IP on the local network. Having trouble figuring out which IP address we actually need to be using on the client side of this program in order to access the server computer. Can someone walk through this process?? We are working on Mac OSX 10.5. Thank you in advance!

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• Unable to access the server via SSH

  - by Rishee

  when I am trying to access the server through ssh it says: ssh: connect to host xx.yyy.zzz.x port 22: Connection refused and on the server in auth.log it shows following log entry: Address xx.yyy.zzz.x maps to xx.yyy.zzz.x.static-pune-vsnl.net.in, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! I have created a user account for that user and it is also in enabled status. Requested info It is Ubuntu 11.10 It is configured as SSH Server using openssh-server I am trying to connect to this server using Putty from Windows 7 i.e. My Desktop I have also asked this on AskUbuntu: http://askubuntu.com/questions/118556/unable-to-access-the-server-via-ssh

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• unreachable subnet in one direction

  - by Carl Michaud

  I'm unable to route traffic to a subnet in my home. Here's my topology: INET <- Router A <- Router B <- WIFI AP where: Router A - ARRIS TG862G/CT (from comcast) - WAN DHCP, LAN 10.0.0.99 Router B - Linksys WRT400N with DD-WRT - WAN 10.0.0.12 , LAN 10.0.1.1 I was able to use DD-WRT to configure a static route for the 10.0.1.x network back to the 10.0.0.x network. But I'm not sure if i can do the reverse on the ARRIS router and was looking for suggestions on how to fix that. I've set things up this wasy because I am using OpenDNS to mange internet content for my kids and of course I wasn't able to configure DNS to my liking on Router A either. So at present I'm using Router A on 10.0.0.x to provide a private unfiltered WIFI AP (no ssid broadcast) that I use for netflix only and then I use router B to provide a filtered WIFI AP for the rest of my WIFI devices on 10.0.1.x. However I would like to be able to connect to my 10.0.1.x devices from the internet via dynamic dns; but I can't see anything behind router B this way. Thoughts?

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• Create a tunnel to my dedicated windows server

  - by Mobiz

  I have a Win 2008 dedicated server. The remote access for MSSQL db is disabled. However I want to connect to it during development from my system. I need to create something like a tunnel from my lap so as to access it. I don't have static IP. Another reason for mentioning about creating tunnel is that my server IP has been whitelisted with other server. The data must originate from my dedicated server then only I can do the testing.

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• IIS 7.5 and ASP.NET MVC Routing

  - by m__

  I'm running an ASP.NET MVC 3 application on an IIS 7.5 server (my development server). When I set up my production server something goes wrong. Serving the same application binaries, using the same web.config file and connecting to the same database I get different results. Something must be wrong with my IIS configuration, but what? Here's an example I visit http://mysite.com/An/AspNetMvc/Routed/Address/1 and everything works I visit http://mysite.com/An/AspNetMvc/Routed/Address/1.1 works on my development server but not on my production server which gives the following error HTTP Error 404.0 - Not Found The resource you are looking for has been removed, had its name changed, or is temporarily unavailable. Module IIS Web Core Notification MapRequestHandler Handler StaticFile Error Code 0x80070002 Somehow the URL is served as a static file on my production server which led me to investigate my IIS Handler Mappings, but without luck.

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• virtualbox and nginx server_name

  - by Ivan

  I'm trying to configure gitlab running in an Ubuntu 12.04 guest with Windows7 host. I can ssh the guest using port-forwarding and access the nginx server using port redirection (8888 in host is 80 in guest, so localhost:8888 in host gets to the nginx server in the guest), but the server_name in nginx configuration file is giving me trouble. What is the correct listen and server_name that nginx would accept? The guest has the NAT interface at 10.0.2.15 and Host-Only interface at 192.168.56.101, static. Thanks!

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• Network configuration problem

  - by Musti

  in my dorm I have to change network configuration and then if it is successfull, I have to enter a user name and password for wired internet connection. Anyway, I had many attempts but I couldnt achieve, and please look at my steps and tell me if there is something wrong and at the end there is an error, but I really dont have any idea about this error. (I am a new ubuntu user, and network is far away of my interests) 1) /etc/network/interfaces auto eth0 iface eth0 inet static address 172.030.014.038 netmask 255.255.255.252 network 192.168.2.0 broadcast 192.168.2.255 gateway 172.030.014.038 2) sudo gedit /etc/resolv.conf nameserver 010.050.001.001 nameserver 010.050.001.002 3) /etc/init.d/networking stop Deconfiguring network interfaces... [ OK ] 4) /etc/init.d/networking restart Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces Reconfiguring network interfaces... 172.030.014.038: Unknown host ifconfig: `--help' gives usage information. Failed to bring up eth0 Note: IP-address, netmask, gateway, Preferred DNS server and Alternate DNS server ara given by the management of Dorm. It wad very easy in windows but I couldnt achieve in Ubuntu. I also tried to edit from "edit connections" but the save button is gray and I cannot save it. Thanks in advance. / Musti

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• What is the Best Internet Provider in the Salt Lake Valley for hosting your future online business f

  - by Justin

  This is for people familiar with the ISP scene in Salt Lake. Also, UTOPIA is not available in my neighborhood yet. I'm looking for comparisons between Comcast, Qwest, and especially other providers I'm not aware of. While I will have online backup (of course!), I want to host some things from my own home at the start of my business. Once money starts flowing in, I will move to a hosted provider, but in the meantime I would like a provider which provides fast (1+ mb/s at least) upload speeds (fast download a given), a static IP, and especially a reasonable price.

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• Dynamic (C# 4.0) &amp; Var in a nutshell.

  - by mbcrump

  A Var is static typed - the compiler and runtime know the type. This can be used to save some keystrokes. The following are identical. Code Snippet var mike = "var demo"; Console.WriteLine(mike.GetType());  //Returns System.String   string mike2 = "string Demo"; Console.WriteLine(mike2.GetType()); //Returns System.String A dynamic behaves like an object, but with dynamic dispatch. The compiler doesn’t know anything about it at compile time. Code Snippet dynamic duo = "dynamic duo"; Console.WriteLine(duo.GetType()); //System.String //duo.BlowUp(); //A dynamic type does not know if this exist until run-time. Console.ReadLine(); To further illustrate this point, the dynamic type called “duo” calls a method that does not exist called BlowUp(). As you can see from the screenshot below, the compiler is reporting no errors even though BlowUp() does not exist. The program will compile fine. It will however throw a runtimebinder exception after it hits that line of code in runtime. Let’s try the same thing with a Var. This time, we get a compiler error that says BlowUp() does not exist. This program will not compile until we add a BlowUp() method.  I hope this helps with your understand of the two. If not, then drop me a line and I’ll be glad to answer it.

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• PDF export printing in Internet Explorer [closed]

  - by user619804

  protected static byte[] exportReportToPdf(JasperPrint jasperPrint) throws JRException { JRPdfExporter exporter = new JRPdfExporter(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos); exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, "this.print({bUI: true,bSilent: false,bShrinkToFit: true});"); exporter.exportReport(); return baos.toByteArray(); } We are using code like this to export a PDF document from a Jasper application. The line exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, "this.print({bUI: true,bSilent: false,bShrinkToFit: true});"); adds JavaScript to send the PDF document directly to the printer. The expected behavior is that a print dialog will come up with a preview of the PDF document. This works fine most of the time - except I am having problems about one out of every 5-6 times in Internet Explorer 8 and Firefox. What happens is - the print preview dialog with the PDF document does not appear or it appears with a blank document in the preview window. -I've tried a number of different JavaScripts (different params to this.print() via exporter.setParameter -I've tried setting different response headers such as response.setContentType("application/pdf"); response.setHeader("Content-disposition","inline; filename=\"" + reportName + "\""); response.setContentLength(baos.size()); these did not seem to help This seems to be an IE and FF issue. Has anyone ever dealt with this problem? I need to get it to work across all browsers 100% of the time. Perhaps a different approach to accomplish the goal of sending the PDF document export directly to the printer? or a third party library that will work across browsers?

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• shut down FTP from IIS 6 after <X> failed login attempts

  - by Justin C

  Is there a setting in IIS 6 to turn an FTP site off after a specified number of failed login attempts? It has already been documented on this site that a Windows server sitting on a static IP address can record tens of thousands of failed login attempts a month. One server I maintain has had tens of thousands of attempts made against the FTP port. I have solid passwords in place, so I am not overly concerned. I rarely have to use the FTP, so for the most part I turn it on and off as I need it. Sometimes though I forget to turn it off when I am done, only to find the next day that my EventLog is full of audit failures. I would want to set a high number, in case I just messed up the password. Something like if 50 failed login attempts happen, just turn off the FTP site. Then if I need it later I can just start it again.

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• including files in a symlink directory when backing up with duplicity

  - by Rob

  I'm backing up using Duplicity, great tool. I'm unable to include files in the backup that are within a directory that is a symlink. Using the following: duplicity <dup args> --include /var/www/**/current --exclude '**' duplicity will only backup the symlink I've tried: duplicity <dup args> --include /var/www/**/current/* --exclude '**' # and duplicity <dup args> --include /var/www/**/current/** --exclude '**' Not even then symlink is backed up. the "current" directory links to directory like: /var/www/host.com/de9f2c7fd25e1b3afad3e85a0bd17d9b100db4b3 The files contains a few static html & css files. I want those files to be backed up, regardless of which sha'd directory "current" points to. Any help appreciated.

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• Embedded Tomcat Cluster

  - by ThreaT

  Can someone please explain with an example how an Embedded Tomcat Cluster works. Would a load balancer be necessary? Since we're using embedded tomcat, how would two separate jar files (each a standalone web application with their own embedded tomcat instance) know where eachother are and let eachother know their status, etc? Here is the code I have so far which is just a regular embedded tomcat without any clustering: import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.IOException; import java.io.Writer; public class Main { public static void main(String[] args) throws LifecycleException, InterruptedException, ServletException { Tomcat tomcat = new Tomcat(); tomcat.setPort(8080); Context ctx = tomcat.addContext("/", new File(".").getAbsolutePath()); Tomcat.addServlet(ctx, "hello", new HttpServlet() { protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Writer w = resp.getWriter(); w.write("Hello, World!"); w.flush(); } }); ctx.addServletMapping("/*", "hello"); tomcat.start(); tomcat.getServer().await(); } } Source: java dzone

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• OOP implementation of BUFFS and Stats. Suggestion

  - by Mattia Manzo Manzati

  I am developing an MMORPG server using NodeJS. I am not sure how to implement Buffs, i mean, equipped objects or used skills have effects on the Player() which has many Stats(), some of them have a max cap... Effects can change the Stat value, increasing or decreasing it by a value, a percentage or completly rewrite the value of the stat. After a while I have decided to create a base class for buffs, which can be hidden (if they are casted from an equipped object) or shown if they came from an ability (Spell). Anyway I need suggestion how to implement it, use an array for all active buffs for a stat and have a function calculate the value of the stat affected by buffs each time I need the value of the stat or...? Other more OOP's ways to do it? I have read this What's a way to implement a flexible buff/debuff system? but this implements only a percentage system, which buffs can only say "+10%, +20%, etc...", but I would love to have an hybrid system, which can have percentage values or static values (like WoW does), and using modifiers it's hard to implement, because modifiers refers to the current value of stat :/ Thanks for suggestions :)

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