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• Invalid domains in DNS don't work on mac/*nix like systems

  - by David Mulder

  At work we use domains like abc-01, which work fine on windows. Whilst developing mobile applications we already saw that this doesn't work on both iOS and android which we fixed for a few specific domains (by setting the dns up that abc-01.def.local also works in those) and was assumed to be caused by it being an invalid domain. Now however it's necessary to connect through VPN from a mac and changing all relevant domains is not an option at the moment (far too many of them and would require changing the settings of far too many applications), so I was hoping whether somebody knows a trick or setting to get this to work on mac (or even linux in general).

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• Where to set Visual studio 2013 property macros

  - by marcp

  I'm a new VS user. I've received some sample C++ projects working with a 3rd party API. They were saved in VS2012 format, but I have VS 2013. After conversion I find that there is an API specific macro defined in the project properties in the "Linker|General|Additional Library Directories" category. If I click on 'edit' I can replace the macro with an actual path, but how do I establish what the macro points to? In other words, how does one create a macro usable in multiple projects?

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• Two internet connections coming in, one Sonicwall Tz170 (enhanced os), and slow speed

  - by Development 4.0

  I work a lot from my home office and being in general a tad paranoid I have cable and DSL pipes coming into my house. I have used an Ebay bought Sonicwall Tz170 with the enhanced OS for a good while. I believe it does failover and has a feature for doing round robin on which connection is used. I get the impression from using it that I might not be getting the most out of this setup. Is it possible/likely that my router could be a cause of the slowdown? Are there more appropriate choices?

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• deleting old unused images

  - by Ayyash

  As we move on with our content-based websites, lots of images get dumped in our images folder, but we rarely come across self-committed monkyes that delete their files once they do not need it, which means, we end up with a huge list of images in one folder, and it is very tricky to clean it up. My question is (and i dont know if this is the right website to ask it), is there a tool that allows me to find out if an image has been requested by web in the last (n) months? my other general question is, how do you do it? how do you take control of your images folders? what policy do you enforce on developers to clean up? what measures do you take in order to decide what goes and what stays if you end up with an out-of-control situation? my suggestion was to rename the images folder, create a new one, copy the basic ones and wait for someone to complain about a broken image! :) i find this to be the most efficient.

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• How to disable Apache http compression (mod_deflate) when SSL stream is compressed

  - by Mohammad Ali

  I found that Goggle Chrome supports ssl compression and Firefox should support it soon. I'm trying to configure Apache to to disable http compression if the ssl compression is used to prevent CPU overhead with the configuration option: SetEnvIf SSL_COMPRESS_METHOD DEFLATE no-gzip While the custom log (using %{SSL_COMPRESS_METHOD}x) shows that the ssl layer compression method is DEFLATE, the above option did not work and the http response content is still being compressed by Apache. I had to use the option: BrowserMatchNoCase ".Chrome." no-gzip' I prefer if there are more general method in case other browsers supports ssl compression or some has a version of chrome that does not have ssl compression.

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• Guacamole on KVM

  - by Siem Hermans

  I currently run a deployment where I provide virtual machines to circa 25 users through ESXi over the VMWare WSX web portal. This works, no doubt about it, it is fast, stable and reliable enough for the end users. However I stumbled across the Guacamole project (Link: http://guac-dev.org/) and the KVM project (Link: http://www.linux-kvm.org/). I must say I am no genius when it comes to Linux but I am interested in replacing the ESXi and WSX combination with a Guacamole and KVM deployment. I have seen people across the internet use ESXi in combination with Guacamole (mostly prior to the release of WSX), but I have yet to see someone use it in conjunction with KVM. Considering my amount of knowledge on Linux in general I would like to ask: Is it possible at all to combine the two?

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• Database Performance Across 3 NetApp FAS2050

  - by bjd145

  I recently inherited a SQL Server 2005 box that has LUNs mounted on it from three different NetApp FAS2050 filers. The reason there are three is because the first two filers are out of space and our databases continually need more of it. What kind of performance impact (if any) does this setup have? Is it better to move the LUNs from the two other older filers to the newer one so that we have only one filer/controller for caching, etc ? This is in general. I apologize for not having more specifics.

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• How to track down a file descriptor leak?

  - by cclark

  I have a java process (Glassfish) which is leaking file descriptors. I know this because I get the helpful java.io.IOException: Too many open files exception. I can look in /proc/PID#/fd and see all the open file descriptors. When I use lsof I get a very large number of entries like this: java 18510 root 8811u sock 0,4 1576079 can't identify protocol java 18510 root 8812u sock 0,4 1576111 can't identify protocol java 18510 root 8813u sock 0,4 1576150 can't identify protocol I see 12 new ones created per minute. What options can I use on lsof or what other tools are available to me to help track down socket file descriptors where the protocol can't be identified? thanks, chuck

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• Which FLOSS text editor is most like kwrite without being KDE-based?

  - by darenw

  Among text editors on Linux, I usually prefer KWrite. I like that I can quickly turn on/off line numbers and line wrap in the View menu. Other settings are easy to change. Other text editors I've used in the past, such as Gnome's gedit, bury line numbering and wrapping checkboxes deeper into the menu system, making it more distracting to change while concentrating on real work. However, KWrite is a KDE app. On Ubuntu it drags in over a dozen other packages, which I suspect I don't really need. Why would a text editor need all that? It's slower to start up than some other editors I've tried. I'm also trying to run an all-gnome system w/o any KDE, just to see how far I get with it. So, what GUI text editor isn't KDE-based, has few dependencies and quick start-up, easy to change line wrap and numbering, and general similarity to KWrite? What comes closest?

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• Ubuntu issues when moving hard disk to new system

  - by Tim

  I'm working on a legacy project with a small single board computer running Ubuntu 10.04 on a compact flash card. I need to be able to save away a working image (via dd) and copy said image to other compact flash cards for use in other single board computers (with identical hardware) I'm able to copy the image to other flash cards and bootup on other systems no problem. But I'm seeing strange behavior. For instance, I can't use sudo on the new system (“sudo: must be setuid root”). I've gone down the path of trying to fix this, but have run into a slew of other issues. General question is: what do I need to be aware of when moving a hard disk containing Ubuntu (in my case a compact flash card) to another computer? I was hoping it would be seamless to Ubuntu since it's moving to a system with identical hardware. Is there something that needs to be done to make it "portable"?

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• GNU screen configuration for optimal keycode recognition

  - by intuited

  Currently GNU screen will botch up certain keystrokes, for example CTRL pressed in combination with the arrow keys, so that eg when in vim insert mode, CTRL-PGUp will Uppercase the next/current word (or something like that). I'd like for it to work pretty much transparently, so that the functionality is the same as when it's not running (with the obvious exception of CTRL-a control sequences)... is this possible? Also — and I suspect this is more or less a separate issue — I'd like for the scrollwheel to scroll back in the session log rather than cycling through the history as it does now. Doable? Or perhaps it could be set to emulate a much larger screen size that the terminal app that it's running under could keep that text in its session log. either way the goal would be to be able to use the mouse wheel and/or shift-up-arrow to scroll back in the session log.

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• QR Codes for Files on Google Code

  - by Synetech inc.

  Hi, When you download files from Google Code now (example), in addition to the text version of the SHA1 hash, it includes a QR code of it. The device that the file was downloaded to is the one that has to hash the file. But, if it can download the file (ie, has access to the webpage), it also has access to the text version of the hash, so the QR code seems completely useless—and more work to decode when the raw text is available. How would reading the hash into a mobile phone allow you to verify the file you download to the computer? Or if you download the file to the phone, how would you use the phone to take a picture of the QR code displayed on the webpage on its own screen? Does anyone know what the point to the QR code is or how you would use it to verify the downloaded file (I don’t mean QR codes in general, but specifically in this context).

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• Windows 8.1 Search does not automatically select first search match

  - by Miguel Sevilla

  When I search in Windows 8/8.1 (start menu-start typing), it doesn't automatically highlight the search term. For example, if I'm trying to open the "Internet Options" panel and type the entire thing out in search, I have to down arrow or tab to the "Internet Options" search result. This is retarded. I'm used to Windows 7 style search where the first match is highlighted and i can easily just hit return. First match highlighting does work for other built-in things like "Control Panel", but it should work for all things in general, as it did in Windows 7 search. Anyways, if there is an option to enable this in Windows 8/8.1, I'd appreciate the tip. Thanks!

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• How can I selectively increase latency? E.g. throttle games

  - by Arcymag

  Basically, I want networked games to run poorly on a network, but I want everything else to run smoothly. I would also appreciate advice on blocking games in general. As far as I can tell, there's a few ways to completely prevent an internet game from running: Blocking entirely via DNS configuration (e.g. hosts file), or router DNS configuration Blocking entirely via a separate DNS server Blocking the application, by uninstalling or some kind of access control Blocking the application by automatically killing the process every once in a while Blocking the application by corrupting files periodically However, I would like a more subtle way to block a program. Something that either: Increases latency (would this be doable through some kind of QoS like what DD-WRT offers?) Increases latency by using a special routing configuration for specific target IPs Throttle other systems resources, such as memory, IO, or CPU Screw around with keyboard configurations when a game is launched I would like this to work on MacOSX and Windows, but Linux would be great too. FYI I don't have a kid, but I was brainstorming with some friends and parents.

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• Firefox: This connection is untrusted + Behind corporate firewall

  - by espais

  I've seen some similar issues strewn throughout Google's results about this, but none seem to be corporate-specific. I continually get the 'This connection is untrusted' screen every time I attempt to log into a secure site...for instance Gmail. This is pretty annoying as sometimes I have to go through the process of adding the exception two or three times before it finally lets me into Gmail. I am behind a corporate firewall, going through an internal proxy server to get to the Internet, so there is no possibility for me to update the firewall...etc. Does anybody know a way around this? Can it simply be disabled (and is that safe)? EDIT I'm going to reopen this question with a bit of new information. I have been using Google Chrome lately until today, and one thing that I noticed was that I never had this issue when using either Chrome or Internet Explorer. Is there something that these other browsers do that I need to manually do in FF?

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• Winxp system context menus blank after last security update

  - by Peter Rowell

  Because of a CERT advisory of several out-of-band security updates released by MS I did a Critical Updates pass on my WinXP Pro SP3 machine. I now have the situation where it seems that all of my WinXP-generated menus come up with all items black. If I wave the cursor over the menu, the items will update as they become active (go blue) and then update correctly (to black-text-on-white-background) as they go non-active. Separators (which never get a hover event) stay black. App-level context menus seem to work fine (Firefox, OpenOffice, etc.) with the exception of Windows Explorer and Internet Explorer, which both exhibit this behavior on both their context menus and on their menu bar drop down menus. I'm assuming that's true because they are all using the same library code. Thoughts? Fixes? Help!

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• test of ICMP block

  - by Marcos

  In my bash scripts I have been using something like: until fping -u google.com; do echo "$0[$$] Network/DNS down?? $(date)" 1>&2 && sleep $(($RANDOM%(1 + ++trynum * 1) +1)).222; done to test for online connectivity. It halts in place, sleeping growing random intervals, until it can ping google.com again. Problem: At some sites ICMP pings are blocked altogether, and web pages are still reachable. What's a short way to test for this general case? Based on that test I will switch over to an http-based test like the exit status of curl -s google.com >/dev/null if that is a good one.

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• Ruby, Rails & MySQL parity between Mac Client (10.6) & XServe (10.5)

  - by Meltemi

  We're setting up a RoR setup with Development on Mac OS X Client (10.6.3) and then using a Mac OS X Server (10.5.8) for testing and eventually deployment. I'd like to get as many systems in sync on these machines as possible. Wondering if there are any pitfalls. I seem to understand what's necessary under Client but Server has some hardwired stuff that I want to make sure doesn't break...or is updated correctly. Currently installed on both machines we have: OS X Client (10.6.3): Ruby 1.8.7 Rails 2.3.5 MySQL (not installed yet) OS X Server (10.5.8): Ruby 1.8.6 Rails 2.3.5 MySQL Ver 14.12 Distrib 5.0.82 Any suggestions...Ideally from someone who's done this on Leopard Server as well but I'll listen to general tips & proceedures

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• How to debug why w3wp.exe crashes randomly?

  - by sassyboy

  On the main production server, the IIS worker process crashes sometimes. From the event viewer I get the following information. Faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 Faulting module name: KERNELBASE.dll, version: 6.1.7601.17651, time stamp: 0x4e211319 Exception code: 0xe053534f Fault offset: 0x0000b9bc Faulting process id: 0x%9 Faulting application start time: 0x%10 Faulting application path: %11 Faulting module path: %12 Report Id: %13 This happens randomly on the prod server and I have not been able to recreate this crash anywhere else. This was happening on IIS 6, and we recently moved to Windows Server 2008 and IIS 7.5 and the crash happens there as well. How to go about finding the root cause of this?

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• DNS error only in IE

  - by Le_Quack

  Our Intranet page has stopped working on some machines/some user accounts. The error I am getting points to a DNS issue but If I ping the site from the command line the it responds fine. The error I'm gettting on IE is Error: The web filter could not find the address for the requested site Why are you seeing this: The system is unable too determine the IP address of intranet.example.com I'm not quite sure why it mentions the web filter as there is a proxy exception for the intranet page and if I run a trace route it doesn't go via the web proxy (filtering system). Finally it isn't affecting everyone, just random users, also it doesn't affect the random users on all the client machines they use. I have one user where it happens on any client they log onto where most its just certian clients. It's even "fixed" itself for a few peoples. EDIT: hey Mikey thanks for the fast response. Proxies are correct and automatic configuration is off (both via GPO)

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• Why did cherokee-admin-launcher crash?

  - by DarenW

  I'm trying out the Cherokee http server on a seemingly fine machine. Following simple set-up instructions, I tried running cherokee-admin-launcher but it printed error messages and hung up. Ctrl-C did not kill it; I had to kill -9 it from another xterm. OTOH, cherokee-admin ran fine (or at least got a lot further). What is the problem with python and cherokee-admin-launcher, and how to fix it? [root@iron rc.d]# cherokee-admin-launcher Checking TCP port 9090 availability.. OK Launching: LD_LIBRARY_PATH=/usr/lib /usr/sbin/cherokee-admin Exception in thread Thread-1: Traceback (most recent call last): File "/usr/lib/python2.7/threading.py", line 530, in __bootstrap_inner self.run() File "/usr/bin/cherokee-admin-launcher", line 209, in run return self._run_guts() File "/usr/bin/cherokee-admin-launcher", line 217, in _run_guts env=self.environ, close_fds=True) File "/usr/lib/python2.7/subprocess.py", line 672, in __init__ errread, errwrite) File "/usr/lib/python2.7/subprocess.py", line 1202, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory ^C ^C

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• Could not Upload file in network mapped drive using asp.net/vb.net

  - by Hasan

  I have tried several times to upload file remotely to a mapped network drive, but it is raising an exception: Could not find a part of the path 'X:\test\testing.wav'. I read through various internet /blog/ Microsoft help sites, but I still don't know what is wrong. Does anyone know what is causing this problem and how I can correct it? It works fine when I am uploading to a local drive as a test. It is also working When I am running the code from the development server, but if I try with published code, then it fails. :(

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• How to symlink folders and exclude certain files

  - by Jarrod White

  Hey Guys, I'm not a server guru (unfortunately) but have a decent knowledge of linux & bsd. I'm trying to symlink multiple instances of HLDS (game server) but need to exclude certain folders & config files to achieve this properly. I need to do it this way as HLDS loads many mods automatically, and putting an exception to disable the mods doesnt work for all of them. so basically i want: /home/user/hlds-install (the base install) /home/user/server1 /home/user/server2 etc... and then be able to manually put any configs/mods ive excluded into the server dir's so that each server can be configured individually. Can anyone tell me how to do this, perhaps some sort of bash script so that I can just change the targets to run it each time i want to create a new one. I have quite a number to make so doing the whole thing manually for each one definately isn't an option and im all for working smarter, not harder! Thanks :)

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• Virtualmin - Added Virtual Server - Stopped access to Rails app?

  - by Dan

  Hi, Sorry if this sounds pretty simple, I'm new to Virtualmin and running servers in general. I recently purchased a VPS and installed Virtualmin with no problems. I then installed mod_rails and uploaded my first rails app, which I got working by adding the following to my apache httpd.conf file: <VirtualHost *:80> ServerName testing.mydomain.com DocumentRoot /home/myapp/public <Directory /home/myapp/public> Allow from All AllowOverride all Options -MultiViews </Directory> RailsBaseURI / </VirtualHost> I then tried adding a virtual server through Virtualmin, using mydomain.com. Now, the site this created (plus several sub-servers) and working as expected. However, my original Rails app is no longer accessible. The URL now sends me to the parent application (ie mydomain.com) The Rails app is not located within the parent's application directory, would this be a problem? Can anyone help? Any advice appreciated. Thanks.

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• Which Linux book for aspiring sysadmin?

  - by Ramy

  I have a co-worker who insists that he will never buy a book unless it is considered "THE" book. So, in this vein, I thought I'd ask what the ultimate Linux book is. I wouldn't quite call myself a complete beginner since I can get around in Linux in general pretty well. But, beyond that, I'm also looking for a book with an eye towards becoming a Sys Admin someday. I saw a Junior Sys Admin position open up recently but with the requisite 2-3 years experience, I may have to wait a little while longer before I'm ready to apply for such a position. Having said all that, I'll summarize my question: What is the ultimate Linux book for someone who is ok with the basic tasks of getting around in Linux but also wants to aim towards full Sys Admin status someday? A few examples of the books I'm considering: Linux-Administration-Beginners-Guide-Fifth Linux-System-Administration Linux-System-Administration EDIT: Before you close this question as a dup, I'd like to say that I'm looking for something that goes deeper than this: Book for linux newbies I already have "Linux in a nutshell"

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