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• mod_cache serving the wrong content

  - by J. Pablo Fernández

  I'm trying to use mod_disk_cache to speed up a web site that is running on WordPress. Whenever I enable it with CacheEnable disk / and the rest being the stock Ubuntu configuration I start to get the wrong results. When I see the main page it's fine, but when I go to a specific post I get a RSS feed instead. Like if the cache is returning the wrong content. I've disabled my RewriteRules as it seems mod_cache doesn't work with that. I'm not even sure where to start to debug such a thing. Any ideas?

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• Why do strace/truss sometimes 'fix' stuck processes?

  - by Emmel

  Sometimes you have a stuck process that's been stuck for a while, and as soon as you go to poke at it with strace/truss just to see what's going on, it gets magically unstuck and continues to run! So from merely 'observing' these programs have some impact in the running of the stuck programs .. what's happening here? Did strace (I guess via ptrace(2)?) send a signal, causing the program to cease blocking, or such? I've seen this several times -- most recently on Linux RHEL 4 (and a Perl script mucking with processes and doing some network IO in that case), but in a few other contexts as well. Unfortunately, I can't reproduce this, as it times to happen ... in times of crisis. But my curiosity remains. :-) Any elucidation appreciated.

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• How difficult is it to setup a mailserver?

  - by Jacob R

  I want a secure mail solution, as I am looking to move away from Google and other parties looking into my private data. How much of a PITA is it to setup my own mailserver? Should I go for an external provider with a good privacy policy and encrypted data instead? I have a VPS running Debian (with a dedicated IP + reverse DNS), and I'm a fairly capable Linux administrator, having setup a couple of webservers, home networks, and looking over the shoulder of sysadmins at work. The security I currently have on the VPS is limited to iptables and installing/running the bare minimum of what I need (currently basically irssi and lighttpd). When setting up a mail server, is there a lot of stuff to take into consideration? Will my outgoing mail be marked as spam on other servers if I don't implement a number of solutions? Will reliable spam filtering be difficult to setup? Can I easily encrypt the stored mail?

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• Windows Photo Viewer needs more ram?

  - by Aren B

  Ok, so i went to open a picture with the Windows Photo Viewer (Default) application and it told me this: Windows Photo Viewer can't display this picture because there might not be enough memory available on your computer. Close some programs that you aren't using or free some hard disk space (if it's almost full), and then try again. So looking at my 98% ram usage (thankyou VisualStudio x8 + SQL Server) I rebooted my computer. Now this is my load: And this is my hard-disk loadout: So now I go to load up that image again. SAME MESSAGE, what the heck? So apparantly 6gb isn't enough ram to open a 29k image that loads perfectly fine in MSPaint, Paint.NET, Photoshop It's a .png and it's not corrupt. So my question is: what gives?

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• Flash player displays incorrect colours

  - by neurolysis

  This is not a webapps issue, so please don't move it there. This is an issue with Flash, not with one specific website, as shown in this screenshot: This issue appears to come and go with time, it often also manifests as 'stuttering' playback with audio corruption and strange artifacts on the frames. I tried to uninstall/reinstall Flash a while back when it first started to do this, and that worked briefly, then it came back. Now reinstalling it doesn't fix the problem, even temporarily. Any ideas on the cause and/or a solution?

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• nginx reverse proxy hide redirects

  - by NZCoderGuy

  I've Nginx as a reverse proxy for two sites A and B running behind. The users go from public - reverse proxy - site A - site B (from A to B clicking links) What would be a typical configuration for a scenario like this? The url in the browser should be always the reverse proxy This is what I've so far but is not working worker_processes 2; error_log logs/error.log info; events { worker_connections 1024; } http { server { resolver 127.0.0.1; listen 8080; location / { set $target 'siteA'; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; rewrite ^(.*) $1 break; proxy_pass http://$target; } } }

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• localhost still responses after uninstalling IIS Windows 7

  - by ryanzec

  I was experimenting with IIS and ASP.NET however I want to go back to WAMP as far as my development server stack on my local windows 7 computer. So I disabled the IIS windows program (using Control Panel - Program and Features - Turn Windows Features on or off) and installed WAMP. I then when to localhost in my browser and just got a blank page. I then uninstalled WAMP and tried again and still got the blank page. I cleared my browser all of saved data like cache and still the same effect. I have uninstalled IIS and WAMP however I can't get localhost to return server not found like it usually does. I know the skype can sometimes effect things running on port 80 so I quit that but still it does not work. Is there a way I can figure out what is running on the port and returning me an empty page?

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• sharepoint administrative server not started causing sharepoint deployment instability

  - by Nathan

  When i deploy anything to a variety of sharepoint servers i get problems with some packages failing, from what i can see the only error given is as below. The timer job for this operation has been created, but it will fail because the administrative service for this server is not enabled. If the timer job is sched uled to run at a later time, you can run the jobs all at once using stsadm.exe - o execadmsvcjobs. To avoid this problem in the future, enable the Windows ShareP oint Services administrative service, or run your operation through the STSADM.e xe command line utility. Is this a known problem? I googled for the text but got only one other person with the problem who simply worked round it. I'm trying to batch deploy solutions programmatically and so these errors render the whole code worthless if you have to go back and redo bits by hand afterwards. Is batch deployment simply not possible? Thanks!

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• Windows 7 recognises the wrong router.

  - by Henry

  I have a cable router connected to my cable ISP. On the LANs are 4 computers, one of which is a dual boot XP/Win7 machine. I was given an ADSL wireless router which I connected to one of the LAN sockets on my cable router. I don't have an ADSL connection. All the machines connect correctly, some wirelessly, when my dual boot machine is in XP or off. However, when I go into Win 7 on that machine it finds the ADSL router and wants to connect through that (there's no ADSL connection) instead of my cable router and modem. I've turned DHCP off on the ADSL modem and even tried bridging its connections but neither of these have any effect. To get 7 connected, I have to either disconnect the ADSL router, or switch it off. Remember, the SAME computer on the same LAN works perfectly with the same router connected in XP! How then, can I get Win 7 to recognise the correct router?

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• I can't uncheck the "read-only" attribute from a folder on a Windows Server 2008 machine.

  - by Andrei

  Hello everybody. I have a folder (C:\temp) on a windows server 2008 R2 installation. Initially it has the Read Only attribute checked, but I want to uncheck it. I am able to uncheck it and it even shows me the loading process (it is showing me that it is going through all the subfolders), but after I press OK and I go back to properties, it still remains checked as Read Only. Hope someone has an idea. Thanks. edit: I tried this one, but it doesn't seem to work: http://support.microsoft.com/kb/256614

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• 3rd monitor with Dell Precision 490

  - by Animesh Kumar

  I am trying to go for a 3 monitor setup on my workstation, but need some information before I can invest in a new graphics card and 2 monitors. Would be glad to get some help here: I have a Dell Precision 490 workstation with Nvidia Quadro FX 4500 graphics card (PCI-E 16) on it. It has 2 DVI-D ports that can support 2 monitors upto 2560x1600 resolution. For the third monitor, I was looking at Nvidia NVS 295 card, however I am not sure if it is physically possible to hook another card to the motherboard. Here is the spec of Precision 490: http://www.dell.com/downloads/global/products/precn/en/spec_precn_490_en.pdf Can I attach NVS 295 to it? If not, what options do I have?

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• Troubleshooting web timeouts with a Belkin router

  - by rexzilla

  I have a Belkin FSD7632-4 ADSL wifi router. Ever since I got it, I've faced this problem of websites timing out. For example, I go to flickr.com, and the images won't load because they come from farm1.static.flickr.com. Either I wait 10 minutes or so until the timed out sockets are closed and retry (with variable results) or I reboot the router. This happens irrespective of whether I use wired or wifi network. I'm in India, using Airtel Broadband, and if I use my ISP supplied Beetel 220BX ADSL router (which has no wifi and only one LAN port), everything works fine. I copied over the broadband settings from my old router: VPI/VCI values=1/32 Encapsulation=LLC MTU=1492 I have not enabled any firewall on the router. Is there anything else I can try? Or is it a defect with the router and should I take it back for a replacement? I bought it just 2 months ago.

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• two operating systems sharing their file systems with eachother (Windows and Linux)

  - by John Kube

  I have two operating systems installed on my notebook computer, Windows Vista and Ubuntu Linux. When I boot up, I'm presented with a bootloader which allows me to choose which one I want to load. I'm interested in sharing each operating system's file system with the other, such that I could access my Windows files from Linux and vice-versa. Is this possible, and if so how would one go about setting it up? Feel free to just post a link to an existing solution if there is one. I would Google for this myself, but I don't even know what to search for, as I don't know what this is called.

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• Double GPRS/EDGE speed with two mobile phones at once?

  - by Patrick

  Hi, I'm using my mobile phone to connect to the internet in an area where only GPRS/EDGE is available. To increase the connection speed I would like to use a technique called connection teaming. E.g. I would use two mobile phones / usb sticks to go online with different providers at the same time and let the software distribute requests over both connections. My questions are: is there a software available to do connection teaming? It sounds like Midpoint was able to do it but it's over 7 years old and is unlikely to run on Windows 7 has anybody tried this? Thanks a lot, Patrick

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• WCF Service in Windows Services

  - by sivakumar

  I create WCF service library and i test that working fine on WCF Test client(default). when i host the WCF service in winodws service that time i got the error. I am using windows XP sp3, .Net 3.5 and Visual Studio 2008. i got error. Error opening host : HTTP could not register URL "http://+:8731/WCFServerDLL/Service1/." Your process does not have access rights to this namespace (see "http://go.microsoft.com/fwlink/?LinkId=70353" for details). the above link for microsoft i implement the httpcfg. Here i run the "httpcfg.exe set urlacl /u http://localhost:8731/WCFServerDLL/Service1/ /a" i get the result HttpSetServiceConfiguration completed with 0. what is the problem i got same error. can you give me a suggation.

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• Installing SDM on a Cisco 2821 ISR

  - by Sam Sanders

  I trying to change the configuration of our router, it's a Cisco 2821 Integrated Services Router. I don't know much about Cisco products. While looking at the PDF manual for the router I notices it talked about SDM Security Device Manager. But when I point my web browser at the IP address of the router, it give me a very simple web interface. It's sort of like a string builder for CLI commands. I'm guessing SDM was not installed on it. So my question how would I go about do that? I found this link (below), but I'm a bit new to networking. So any advice would be welcome. http://www.cisco.com/en/US/docs/routers/access/cisco_router_and_security_device_manager/software/quick/guide/SDMq7.html

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• Probability of failure with larger number of network elements

  - by MikeKulls

  I'm having a discussion with a work colleague. I'm saying that a network with 100 elements will have pretty much 10 times as many failures as a network with 10 elements, ie a tech will need to replace faulty hardware 10 times more often. He suggests that the failure rate doesn't go up in a linear fashion and the failure rate will be significantly less than 10x, in fact only slightly more failures. This is not the probability of an outage etc, we are just talking in relation to the amount of parts that a tech would need to swap out in a given time frame.

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• How to calculate CIDR notation from entries in a routing table

  - by febreezey

  I have some entries in a routing table that were created using longest prefix matching, and I have to use those entries to determine the a.b.c.d/x notation (CIDR). This is an example entry: 11001000 00010111 00010. That was calculated from the range 11001000 00010111 00010000 00000000 through 11001000 00010111 00010111 11111111. I know the range is from IP addresses 200.23.16.0 to 200.23.23.255, but getting the /x for the subnet # doesn't make sense to me. Anyone know how to properly go about calculating it?

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• Apache localhost problem

  - by hart1994

  I have set up Apache on my Windows 7 PC. Now I have it working fine on the PC, by going to localhost or the IP (192.168.1.71). However when I go to my Mac I try to connect to it via its IP and it doesn't connect. I have also tried this on another computer. Oops! Google Chrome could not connect to 192.168.1.71 Now is there something wrong with the code in the Apache httpd file? EDIT: I have also tried to ping the IP address and it works fine.

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• Just installed Sql Server 2008 and cannot access it

  - by Mendy

  I just install Sql Server 2008 on a new server and I cannot connect to it. I'm trying to connect using Windows Authentication to the localhost but I get the following error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476

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• Mini-ITX board for AM3 Athlon X4 600e processor.

  - by Kamil Zadora

  Hello, I am planning to build a PC to control a robotic platform that I am building (about 50% complete). I need more power than ATOM platform could bring, as the robot will need to do on the fly image processing to work as intended. I was considering using Athlon X4 600e as it is rated 45W Maximum output. Probably underclocked it would go lower than 30-35W. I do not I'am at very long battery life, but the 17Ah, 12V battery should keep it running for few hours. My problem is: motherboard. I am space limited so I am looking for a nice mini-itx AM3 motherboard to match the processor. It is hard to find many tests about power usage of the motherboards itself (for example, when using the same processor on different motherboards, test are usualy done in the opposite matter). Could you provide any motherboard examples or suggest what chipset to look for? Thank you in advance.

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• Is it possible to interrupt or cancel the trash-delete process?

  - by pete

  I am connected to the company server, onsite not remote, which is Windows based. When, in the OS finder, I go to delete a file or directory that resides on the window-based server, the trash progress panel appears as usual. Not infrequently it will just hang there appearing to be active but no progress occurs on the progress bar. So the X is chosen to stop or cancel the process. A new panel appears, and while appearing to be active, again, just hangs there indefinitely. My lack of reputation prevents posting a screen shot - sorry. The question then is this: Is there a way via the Activity Monitor, Terminal, etc. to interrupt this deleting process in the Mac OS? Currently, I have to force shutdown and reboot to eradicate the ever-deleting panel. Finder relaunch does not solve and only eliminates the finder until I force reboot. Any assistance is appreciated. Thanks, Pete iMac, Mac OS X (10.6.8), i7-2.8ghz, 8gb ram

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• Windows Server 2008 R2 64bit Screen Frozen and Remote Desktop Freezes but Server Continues Working

  - by Jacques

  I've asked this question a couple of times but I don't seem to be getting any real answers. We have a SBS (Windows Server 2008 Rc) server and suddenly the screen has started freezing. Even when we go into the system via remote desktop it worked once or twice (since the problem started), but now the RDP screen freezes once it gets just past the Welcome screen. The server itself is running, SQL is working, Exchange is working, file share is fine. It's just the UI that isn't working. We've tried hard resetting and that works for a short while before the problem comes back. Where do we begin to resolve this issue? Thanks, Jacques

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• My EEEPc 900HA won't turn on/boot. Can it be fixed or does it need to be sent in?

  - by th3dude19

  My EEEPc 900HA stopped booting up out of nowhere. It went to sleep and when I went to wake it up, it wouldn't wake up. I powered down and went to power back up, but no go. The power light comes on solid and the battery/corded power light blinks consistently. There is no HDD activity or light activity. No BIOS. Just the lights described. I've troubleshooted the RAM, HDD, and internal power connections and everything checked out both on battery power and corded power. I've also reset the CMOS to no avail. What else can I do?

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• Stuck with Visual Studio 2010 Beta 2 errors

  - by Clueless

  A ways back I installed Microsoft Visual Studio beta 2. Today I installed Visual Studio 2010 from Dreamspark (the one with the activation key baked in). This resulted in an install with no place to put an activation key (I don't have one anyways), but I still get the following error when I try to start it: Your Microsoft Visual Studio evaluation period has expired. You will need to upgrade Microsoft Visual Studio to the latest release. This didn't go away with a complete uninstall and reinstall, and I have no idea how to fix it. A quick internet search reveals that this is the error message from Beta 2 after the date at which the RTM version went live. I have a feeling that the message is due to some hanging registry entries (I went through the manual uninstall instructions here). Does anyone know how to find and eliminate all vestiges of Beta 2 or something?

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