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• Why does yum index get corrupted?

  - by TomOnTime

  Occasionally yum's cache gets corrupted and we see errors like this: error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages index using db3 - (-30974) error: cannot open Packages database in /var/lib/rpm The workaround is rm -f /var/lib/rpm/__db* and then the next "yum" command regenerates the data. My question is: what is likely to be causing this? Is there some common task that ignores locks or has other problem that causes this? We have hundreds of CentOS machines and there is no pattern to which see this problem. It could be a "one in a million" issue, which at large scale is seen often. NOTE: I realize this is a very "open ended" question, but if an answer finds the cause, I will go back and turn the question into something more canonical that directly relates to the specific issue.

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• How to enable logging for Google Chrome in Ubuntu 12.04?

  - by skytreader

  I'm trying to capture the logs for a certain bug I'm having with Google Chrome. However, I can't find/enable logs for GC. According to this Chromium project page, I just need to add the flags --enable-logging --v=1 and a chrome_debug.log file will appear in my user data directory. However, after running GC (and closing through the 'X' title bar button) there is no chrome_debug.log file in the specified directory. I even tried running as root as it may have something to do with write permissions but GC refuses to start as root. Another thing, GC also prints messages when invoked from command line. I tried capturing this and redirecting them to a file via $ google-chrome > today.log but the messages are still printed in the command line and the file I specify gets created but remains empty. Note that I can't just copy-paste the messages printed on terminal after my bug occurs as the bug freezes up my whole system that, when it occurs, my only option is to turn off my computer straight via the power button. I've seen a few similar bugs already posted but I find that they don't exactly describe my situation so I'd really like to get some logs for this. So how do I enable logging or, at least, get those terminal messages in a file?

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• How can I delete permanently My Folders in Windows 7?

  - by Rubens

  How can I delete permanently My Music/My Pictures/My Videos/etc. Folders in Windows 7? If you delete this folders manually, Windows Media Player 12 recreate all of them again, again and again! It's a nightmare. Anyone knows a registry hacking to get rid of these folders forever? Note 1: I know how to disable the Libraries feature in Windows 7, but I don't want this, I want to delete only the folders named above. note2: The "folders monitored" option doesn't exist in Windows Media Player 12.

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• Now that Apple's intending to deprecate Java on OS X, what language should I focus on?

  - by Smalltown2000

  After getting shot down on SO, I'll try this here: I'm sure you'll all know of Apple's recent announcement to deprecate Java on OS X (such as discussed here). I've recently come back to programming in the last year or so since I originally learnt on ye olde BASIC many years ago. I have a Mac at home and a PC at work and whilst I have got Windows and Ubuntu installed on my Mac as VMs, I chose to focus my "relearning" on VB first (as it was closest to BASIC) and then rapidly moved to Java as it was cross platform (with minimal effort) and so it was easiest to work on code from both OSes. So my question, if the winds of change on Mac are blowing away from Java and in this post-Sun era, what would be the best language to focus my new efforts on? Please note, this isn't a general "which language is better?" thread and or an opportunity for the associated flame-war. There's plenty of those and it's not the point. I realise that in the long term one shouldn't be allegiant to an individual language so, taking this as an excuse, the question is specifically which is going to be the most quick to be productive on given the background whilst bearing in mind minimum portability rewrites (aspiration rather then requirement) and with a long term value of usage. To that I see the main options as: C# - Closest in "style" to Java but M$ dependent (unless you consider Mono of course) C++ - Hugely complex but if even slightly conquered, then a win? Is it worth the climb up the learning curve? VB.Net - Already have background so easiest to go back to but who uses VB for .Net these days? Surely if using a CLI language I should use C#... Python - Cross-platform but what about UI for the end-user? EDIT: As a usage priority, I envision desktop application programming. Though the ability to branch in the future is always desirable. I guess graphics are the next direction once basics are in place.

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• How to automate slipstream?

  - by Gregory MOUSSAT

  Since years I use slipstreamed Windows installations. This works very well, but preparing them is tedious : 1 - install a Windows with the last slipstreamed version we have (automated install) 2 - check Windowsupdate to see what's new, and take note 3 - download each new update available 4 - go to step 2 until no new update is available 5 - slipstream them into the last version we have (I already automated this step) I'd like a way to automate parts or all of this. Maybe a program able to know which updates are installed (already saw one, I don't remember which, and I know PowerShell can do this)... and able to download them ? Or to get them from local disk ? So the steps become : 1 - install a Windows with the last slipstreamed version we have (automated install) 2 - use Windowsupdate until no new update is available (any way to automate ?) 3 - use the magic program 4 - slipstream

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• Stopped windows firewall service during ICS, how is this possible?

  - by insipid

  Although windows firewall is required to be on when you "start" Internet Connection Sharing, you can stop the WF service with MMC. When done a client can still use the host machines internet. The firewall had port 80/http blocked, and now it is open for incoming traffic. However other ports used by applications on the host and client which communicate with each other still seem to be blocked. Can anybody explain what might be happening here? Doesn't ICS need windows firewall for NAT? Note: I am not actually seeing anything in the firewall logs after stopping the service, but even packets sent localhost on the host machine never arriving on these other random ports.

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• BASH_ENV ignored on solaris?

  - by Peeter Joot

  In my .bash_profile, executed for both my interactive and non-interactive logins are BASH_ENV=$HOME/.myinteractivestuff export BASH_ENV doing this for bash on Linux works fine, but on Solaris is not sourced: bash --version GNU bash, version 3.00.16(1)-release (sparc-sun-solaris2.10) Curiously, if I invoke screen within my login shell, BASH_ENV is then read. Are any restrictions on when $BASH_ENV is respected on Solaris? In my case I'm logging in with ssh using putty, but also tried unix to unix ssh, and telnet and see the same. Note that I know that my BASH_ENV variable assignment is being executed since I can echo this variable after login without any trouble (ie: ruling out the obvious possibility that my .bash_profile is also not being read).

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• Two VPN connections from the same IP address

  - by Tayles

  I have set up a server running Windows Server 2008 which two remote users can dial into using a VPN connection. It works fine unless they are both in the same location, in which case only one of them can connect. I understand this is because the PPTP protocol cannot cope with two VPN connections from the same IP address. Is this correct? If so, what can I do about it? Please note that the remote location in question is a serviced office, so we're not in a position to change or play around with their router. Thanks!

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• MySQL Connector/Net 6.6 GA has been released

  - by fernando

  MySQL Connector/Net 6.6, a new version of the all-managed .NET driver for MySQL has been released.  This is the GA intended to introduce users to the new features in the release.  This release is feature complete. It is recommended for use in production environments. It is appropriate for use with MySQL server versions 5.0-5.6 It is now available in source and binary form from http://dev.mysql.com/downloads/connector/net/#downloads and mirror sites (note that not all mirror sites may be up to date at this point-if you can't find this version on some mirror, please try again later or choose another download site.) The 6.6 version of MySQL Connector/Net brings the following new features:   * Stored routine debugging   * Entity Framework 4.3 Code First support   * Pluggable authentication (now third parties can plug new authentications mechanisms into the driver).   * Full Visual Studio 2012 support: everything from Server Explorer to Intellisense&   the Stored Routine debugger. The release is available to download athttp://dev.mysql.com/downloads/connector/net/6.6.html Documentation ------------------------------------- You can view current Connector/Net documentation at http://dev.mysql.com/doc/refman/5.5/en/connector-net.html For specific topics: Stored Routine Debugger:http://dev.mysql.com/doc/refman/5.5/en/connector-net-visual-studio-debugger.html Authentication plugin:http://dev.mysql.com/doc/refman/5.5/en/connector-net-programming-authentication-user-plugin.html You can find our team blog at http://blogs.oracle.com/MySQLOnWindows. You can also post questions on our forums at http://forums.mysql.com/. Enjoy and thanks for the support! 

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• htaccess rewriterule leading slash

  - by Tiddo

  I'm using htaccess to rewrite my urls so that I can have nice clean urls. However, the same htaccess file does different things on my local server and my remote server: On my local server the url to the website is like http://localhost/example/ and on my remote server the url is http://example.com/. For my local server I can use the following htaccess redirect rule: RewriteRule ^(.*)$ index.php?page=$1 [L,QSA] However, when I use this on my remote server I get an internal server error. Instead I have to use this: (note the leading slash) RewriteRule ^(.*)$ /index.php?page=$1 [L,QSA] Unfortunately this doesn't work on my local server: this rewrite rule requests http://localhost/index.php instead of http://localhost/example/index.php on my local server. How can I make this work on both my remote and local server?

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• Intercepting LAN network traffic via WiFi

  - by user1613655

  Let's get straight to the point. This is my fictive network architecture: My question is: Would it be possible for Laptop B to intercept traffic sent and received by Laptop A? Please note that B only has WiFi access and no physical control over Router B. Furthermore, Router A and B create different wireless networks with different encryption keys. If both shared the same wireless network or Laptop B had LAN-access to Router B, the answer would be trivial, but I'm not sure how the answer turns out in this scenario :-/ Thanks for your valuable help!

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• Computer to act as keyboard

  - by Joe

  Title explains it. Imagine this example, Host computer connects to a Client computer via male/male usb connection. Client computer acknowledges this connection as a new device, in this case a keyboard. The host computer can now send key events to the client computer and the client computer would process them as a normal keyboard event. I did a whole lot of searching in the internet and really have drove down many dead ends. Any tips would be appreciated. Note* this is a physical connection. The client computer should not have to install any software for this to function (The host will completely spoof as a keyboard).

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• stop apache from asking for SSL password each restart

  - by acidzombie24

  Using instructions from this site but varying them just a little i created a CA using -newca, i copied cacert.pem to my comp and imported as trusted issuer in IE. I then did -newreq and -sign (note: i do /full/path/CA.sh -cmd and not sh CA.sh -cmd) and moved the cert and key to apache. I visited the site in IE and using .NET code and it appears trusted, great (unless i write www. in front which is expected). But every time i restart apache i need to type in my password for the site(s?). How can i make it so i DO NOT need to type in the password?

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• Kill child process when the parent exits

  - by kolypto

  I'm preparing a script for Docker, which allows only one top-level process, which should receive the signals so we can stop it. Therefore, I'm having a script like this: one application writes to syslog (bash script in this sample), and the other one just prints it. #! /usr/bin/env bash set -eu tail -f /var/log/syslog & exec bash -c 'while true ; do logger aaaaaaaaaaaaaaaaaaa ; sleep 1 ; done' Almost solved: when the top-level process bash gets SIGTERM -- it exists, but tail -f continues to run. How do I instruct tail -f to exit when the parent process exits? E.g. it should also get the signal. Note: Can't use bash traps since exec on the last line replaces the process completely.

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• MySQL can only log in as root, even after creating new users with their own database

  - by ionFish

  Problem: I just set up a Debian Wheezy installation for testing, and installed the LAMP packages and PMA. I can log in as root with my pre-defined password, create/edit/delete both databases and users. The problem comes when I create a new user 'something', set a password for it, and grant it all privileges on a table 'something' (same as the username). Upon connecting, it denies access to the user. Details: Host: localhost using MySQL 5.5.24-8 Creating user: CREATE USER 'something'@'%' IDENTIFIED BY '***';GRANT USAGE ON *.* TO 'something'@'%' IDENTIFIED BY '***' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0;CREATE DATABASE IF NOT EXISTSsomething;GRANT ALL PRIVILEGES ONsomething.* TO 'something'@'%'; Checking privileges: GRANT USAGE ON *.* TO 'something'@'%' IDENTIFIED BY PASSWORD '*92F9DAF5F5129554509489FDB6A433510223C799'; Result: Access denied for user 'something'@'localhost' (using password: YES) More Info: I use this same exact procedure for the Squeeze distribution, and it works perfectly. Is there a chance it's because of Wheezy, or something else? I need to continue using Wheezy because of the updated packages (for this test server -- the others work fine), so 'just use Squeeze' is not an option. Note: I HAVE tried flush privileges; to no avail.

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• How to leverage the internal HTTP endpoint available on Azure web roles?

  - by adelsors

  Imagine you have a Web application using an in-memory collection that changes occasionally, loading it from storage on the Application_Start global.asax event and updating it whenever it changes. If you want to deploy this application on Azure you need to keep in mind that more than one instance of the application can be running at any time and therefore you need to provide some mechanism to keep all instances informed with the latest changes. Because that the communication through internal endpoints between Azure role instances is at no cost, a good solution can be maintaining the information on Azure Storage Tables, reading its contents on the Application_Start event and populating its changes to all instances using the internal HTTP port available on Azure Web Roles. You need to follow these steps to leverage the internal HTTP endpoint available on Azure web roles: 1.   Define an internal HTTP endpoint in the Web Role properties, for example InternalHttpEndpoint   2.   Add a new WCF service to the Web Role, for example NotificationServices.svc 3.   Add a method on the new service to receive notifications from other role instances. 4.   Declare a class that inherits from System.ServiceModel.Activation.ServiceHostFactory and override the method CreateServiceHost to host the internal endpoint.   Note that you can use SecurityMode.None because the internal endpoint is private to the instances of the service, this is provided by the platform. 5.   Edit the markup of the service right clicking the svc file and selecting "View markup" to add the new factory as the factory to be used to create the service    6. Now you can notify changes to other instances using this code:

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• I want to easily switch accounts for Twitter - is there a Firefox/Chrome/IE plug-in to do this?

  - by Edelcom

  I have several Twitter accounts to which I post messages. One is a personal, one is a professional, and a couple for each software system I developed. Does any one know of a plug-in for one of the major web browses on Windows or program that allows me to easily login to multiple Twitter accounts and easily switch between them ? I now have the 4 major browsers installed on my computer , each with it's own Twitter account (with the password and login info saved), but I think there must be a better way. On a side note: it is getting harder and harder to know to which StackOverflow alike site a question must be posted. So I hope this question here is considered on-topic.

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• Can mod_rewrite Conditions/Rules be executed in random order?

  - by Tom

  I have some mod rewrite rules that test for the presence of a file on various NFS mounts and I would like that the tests occur randomly, as a very rudimentary way to distribute load. For example: RewriteEngine on RewriteCond %{REQUEST_URI} ^/(.+)$ RewriteCond /mnt/mount1/%1 -f RewriteRule ^/(.+)$ /mnt/mount1/$1 [L] RewriteCond %{REQUEST_URI} ^/(.+)$ RewriteCond /mnt/mount2/%1 -f RewriteRule ^/(.+)$ /mount2/$1 [L] RewriteCond %{REQUEST_URI} ^/(.+)$ RewriteCond /mnt/mount3/%1 -f RewriteRule ^/(.+)$ /mnt/mount3/$1 [L] RewriteCond %{REQUEST_URI} ^/(.+)$ RewriteCond /mnt/mount4/%1 -f RewriteRule ^/(.+)$ /mnt/mount4/$1 [L] As far as I understand mod_rewrite Apache will look for the file on /mnt/mount1, then mount2, mount3 and so on. Can I randomize this on each request? I understand this is an odd request but I need a creative solution to some unforeseen downtime. On a side note, do I need to redeclare RewriteCond %{REQUEST_URI} ^/(.+)$ each time like I have done? Thanks

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• /manual/cache folder on my server?

  - by MrZombie

  Hi all, On our site's server, once managed by someone who's no longer with us, there's a folder named "/manual/cache" which contains txt files named+like+this, mostly using pornographic-related keywords. The content is mainly spam-like gibberish. My assumption on the matter is that it's somehow used to spam search engines, but I might be wrong, which is the reason of my question here. Any idea what it might mean/contain? As an additionnal note, the person's hiring period oddly correspond to the dates of the files, which seem to have automagically stopped being generated after the date we parted ways.

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• Why are the prices for broadband bandwidth at data centers much higher than consumer/small business offerings?

  - by odemarken

  The prices for broadband bandwidth at data centers are sometimes as much as 10x higher than for a typical small business/consumer connection, at least where I live. Now, I understand those are two differend kind of products, but what exactly are the differences? Is it mainly because the bandwidth you get at a data center is guaranteed (CIR), while a consumer offer lists maximal bandwidth (EIR/MIR)? Or are there other factors as well? (Note: my previous, much more specific question on the same general topic was closed as not constructive. I tried to extract the core issue and present it in a way that can be answered objectively. If you feel that this question is still bad and should be closed, please care to comment and explain why.)

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• Changing running application's icon in taskbar (not pinned icons) [Solved]

  - by JustcallmeDrago

  I'm using an IDE with multiple windows that cluttered up my taskbar. All the icons and labels are exactly the same (totally unhelpful). I used 7 Taskbar Tweaker (http://rammichael.com/7-taskbar-tweaker-v1-6) to remove the labels from the buttons, but now I'm looking at multiple identical icons. Is there any way to change the icons of these windows, even though they are the same application? This picture shows 5 windows, all from the same program, and 3 windows from Google Chrome. They all look the same! Solved, but please note: These two programs (same author) both work for this, easily: Title Bar Changer Studio & WindowStudio . The problem is, I had my program pinned, which for some reason was causing the icons to not change. Make sure your program is not pinned for this to work!

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• How change the layout (e.g. background-color) of autoplaylists in foobar2000?

  - by UdeF

  A nice feature of the highly customizable music player foobar2000 is to generate autoplaylists. Autoplaylists are filtered lists of music that automatically update when you add new music to your collection. You would usually generate one by searching for something and saving it as new autoplaylists, e.g.: %added% DURING LAST 4 WEEKS %genre% HAS jazz OR %genre% HAS downtempo %date% GREATER 1949 AND %date% LESS 1970 Autoplaylist playlists are locked: You can't add or delete files. You can note that thanks to the little icon in the status bar at the bottom of your screen: foobar2000 let's you customize nearly everything, so here is my question: Is there a way to change the layout of the autoplaylists? For example i want to change the background-color in my playlist view. I use the Columns UI component.

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• How can I tell which laptop touch-screens work well with a stylus (for drawing/taking notes)?

  - by BlueRaja

  I'm looking for a laptop with a touch-screen and stylus for drawing/note-taking. I've read the difference between the different kinds of styluses, but that's only half the story - what about the touch-screen? How do I know if the touch-screen supports "palm-rejection"? Or if the included stylus is a capacitive stylus or a "Wacom digitizer"? Or if the screen will even support Wacom? How can I tell how accurate the touch-screen is (from my testing, some definitely seem to have higher "resolution" than others)? Is there anything else I should be looking at? I don't see any of this information on, for instance, the Newegg specs page for a laptop.

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• Looking for 'WinHlp32.exe compatible' replacement for free redistribution under vista and windows 7

  - by richardboon

  Our software installs a package of legacy software for the client, some of it has old hlp file from 3rd party vendor requiring winhlp32.exe (note: we have no legal right to modify the hlp). Those client may only have cd/dvd and might not have internet access, etc. So I need a free 'WinHlp32.exe compatible' replacement for our redistribution under vista and windows 7. Background of problem: -Microsoft stopped including the 32-bit Help file viewer in Windows releases beginning with Windows Vista and Windows Server 2008. -Starting with the release of Windows Vista and Windows Server 2008, third-party software developers are no longer authorized to redistribute WinHlp32.exe with their programs. http://support.microsoft.com/kb/917607

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• some questions related to ubuntu app showdown

  - by user49557

  Where to ask questions related to ubuntu app developer showdown? http://askubuntu.com/questions/151148/how-do-i-participate-in-the-ubuntu-app-showdown Can I use old code by myself to build on for my entry in the Ubuntu App Showdown contest? after seeing these threads and posting a question at askubuntu where to ask questions related to ubuntu app showdown i got we can ask these questions here my questions: can i submit more than one app in the contest and tell me more about this suppose i submit 5 apps out of which one is won then will it be valid if 2 or 3 are won i think the number of t-shirts does not depends upon number of apps one per person for development i have to use quickly but can i use third party libraries for GUI or other work i think i will need it for eg. pyside the first and second winner will get laptop + mobile too right or not the mobile how the prizes will be delivered will they charge(i don't think so) i would like to use multiple libraries i can use htme right ? more details are always welcomes i have mostly all ubuntu app showdown related pages but if you find something in background than tell me note:i am not saying that i am going to win just questions don't take it in that way

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