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• Opinions on logging in multiprocess applications

  - by chkorn

  We have written an application that spawns at least 9 parallel processes. All processes generate a lot of logging information. Currently we are using Pythons QueueHandler to consolidate all logs into one file. Unfortunately this sometimes results in very messy files which make them hard to read (e.g. Track what exactly is going on in one thread). Do you think it is a viable option to separate all messages into dedicated files, or is this going to make things even more messy due to the high number of files? What are your general experiences when writing log files for multiprocessed/multithreaded applications?

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• Restoring Databases

  - by Grant Fritchey

  I like the way Mike Walsh phrased it: You're Only As Good as Your Ability To Restore. Ain't it the truth. You may be taking backups, incrementals, and log backups of your databases. You may have DBCC in place, and all that fun stuff. But if you haven't restored the database, what do you have? You don't know. The trick is, restoring databases takes up a heck of a lot of space on your servers. To test all your productions backups, you'd need a system with as much space as production. unless.. Ever heard of SQL Virtual Restore? Check it out. With this, you answer Mike's questions and validate your backups without having to have twice the amount of space. That's a win, and we all know, winning is better than losing.

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• How do I run a 64-bit guest in VirtualBox?

  - by ændrük

  I would like to have an Ubuntu 11.04 64-bit test environment. When I try booting the Ubuntu 11.04 64-bit installation CD in VirtualBox, the following message is displayed by VirtualBox: VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot. Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer. What am I doing wrong? Details: VBox.log, ubuntu-test.vbox, and /proc/cpuinfo. Kernel: Linux aux 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux The Virtualization setting in the BIOS is set to Enabled.

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• Top 10 Things You Can Experience in Oracle OpenWorld Lounges

  - by Oracle OpenWorld Blog Staff

  by Mike Stiles From the home office in Redwood Shores, 10 things you can experience in the Oracle OpenWorld Lounges: 10. Log onto free Wi-Fi (from comfortable chairs).9. Grab your Oracle Technology Network t-shirt. 8. Mingle with peers (and non-peers).7. Hang out with top Oracle experts. 6. Consult with Oracle Consulting. 5. Enjoy food & beverages in the Oracle Certification Lounge. 4. Unplug, relax and unwind. 3. Discover new products, services, and more. 2. Ask Oracle Support all your support questions.1. Update your social networks #oow Ready to get your lounge on? Register now.

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• Is LightDM is broken? Autologin works

  - by Ben

  I recently upgraded my Mythbuntu box to 11.10. LightDM worked for a while and then I configured autologin on my user account. After some time, I've removed some packages to lean down the system. Now when I log out (from either Unity or Gnome Shell) I lose the X session, LightDM doesn't start back up. If I disable autologin through /etc/lightdm/lightdm.conf I get no login screen & no X. As I said, autologin works and gives me a Ubuntu Classic desktop. This is the only reference in dmesg to lightdm; [ 17.351023] type=1400 audit(1329530135.420:19): apparmor="STATUS" operation="profile_load" name="/usr/lib/lightdm/lightdm-guest-session-wrapper" pid=1097 comm="apparmor_parser" Can anyone help?

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• PIN request at each login after update to Maverick

  - by Giacomo Verticale

  I have a netbook with included 3G mobile broadband card (Huawei E620). I have configured the broadband network connection in the Network Manager and it works perfectly. However since Maverick upgrade, a window appears just after login I asking for the SIMcard PIN. This happens every time I log in and did not happen with Lucid. Note that the PIN is stored in the configuration of the mobile broadband connection and Lucid was satisfied with that. Is there a way to prevent this request or, at least, to have the system rember the PIN and stop ansking for it? If it may be useful, the broadband network connection is configured as not being available for other users. Also, I would like to keep the SIMcard asking for the PIN; only I do not want to insert it manually at login.

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• How do I limit the size of my syslog?

  - by Wayne Werner

  I've got my mom's computer running Ubuntu 12.04 LTS. It's been working just fine but all of the sudden syslog has been filling up. And by filling up I mean I just deleted a /var/log/syslog that was 400GB in size. Yes - Gigabytes. While I'm sure there was some useful information in there, I'm not sure that 400GB is any kind of information to sift through. And what's really amazing about it is that it happened within a period of 8 hours - I had ran df around noon, and between then and now her drive filled up 30% (from just under 70% to 100%). What could be causing this and how could I fix it?`

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• Problem with Assimp 3D model loader

  - by Brendan Webster

  In my game I have model loading functions for Assimp model loading library. I can load the model and render it, but the model displays incorrectly. The models load in as if they were using a seperate projection matrix. I have looked over my code over and over again, but I probably keep on missing the obvious reason why this is happening. Here is an image of my game: It's simply a 6 sided cube, but it's off big time! Here are my code snippets for rendering the cube to the screen: void C_MediaLoader::display(void) { float tmp; glTranslatef(0,0,0); // rotate it around the y axis glRotatef(angle,0.f,0.f,1.f); glColor4f(1,1,1,1); // scale the whole asset to fit into our view frustum tmp = scene_max.x-scene_min.x; tmp = aisgl_max(scene_max.y - scene_min.y,tmp); tmp = aisgl_max(scene_max.z - scene_min.z,tmp); tmp = (1.f / tmp); glScalef(tmp/5, tmp/5, tmp/5); // center the model //glTranslatef( -scene_center.x, -scene_center.y, -scene_center.z ); // if the display list has not been made yet, create a new one and // fill it with scene contents if(scene_list == 0) { scene_list = glGenLists(1); glNewList(scene_list, GL_COMPILE); // now begin at the root node of the imported data and traverse // the scenegraph by multiplying subsequent local transforms // together on GL's matrix stack. recursive_render(scene, scene->mRootNode); glEndList(); } glCallList(scene_list); } void C_MediaLoader::recursive_render (const struct aiScene *sc, const struct aiNode* nd) { unsigned int i; unsigned int n = 0, t; struct aiMatrix4x4 m = nd->mTransformation; // update transform aiTransposeMatrix4(&m); glPushMatrix(); glMultMatrixf((float*)&m); // draw all meshes assigned to this node for (; n < nd->mNumMeshes; ++n) { const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]]; apply_material(sc->mMaterials[mesh->mMaterialIndex]); if(mesh->mNormals == NULL) { glDisable(GL_LIGHTING); } else { glEnable(GL_LIGHTING); } for (t = 0; t < mesh->mNumFaces; ++t) { const struct aiFace* face = &mesh->mFaces[t]; GLenum face_mode; switch(face->mNumIndices) { case 1: face_mode = GL_POINTS; break; case 2: face_mode = GL_LINES; break; case 3: face_mode = GL_TRIANGLES; break; default: face_mode = GL_POLYGON; break; } glBegin(face_mode); for(i = 0; i < face->mNumIndices; i++) { int index = face->mIndices[i]; if(mesh->mColors[0] != NULL) glColor4fv((GLfloat*)&mesh->mColors[0][index]); if(mesh->mNormals != NULL) glNormal3fv(&mesh->mNormals[index].x); glVertex3fv(&mesh->mVertices[index].x); } glEnd(); } } // draw all children for (n = 0; n < nd->mNumChildren; ++n) { recursive_render(sc, nd->mChildren[n]); } glPopMatrix(); } Sorry there is so much code to look through, but I really cannot find the problem, and I would love to have help.

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• "Updating VMware Tools for Linux" spins forever

  - by Nicolas Raoul

  I installed Ubuntu 11.04 inside VMware Player 3.1.4 inside Ubuntu 10.10 When first booting on the ISO image I was asked if I wanted to download the VMware Tools for Linux and I accepted. It downloaded for a few minutes, and then it has been "updating" for an hour already. Even shutting down the VM does not stop it. If I try to exit VMware, I am told "Cannot exit while still downloading. Cancel all downloads and try again." but the dialog's Cancel button is greyed out. Nothing special in vmware.log I ended up killink VMware. A few days after I restarted it, it asked about the VMware Tools again, I accepted again, and same problem...

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• Jupiter seems to break multimonitor setup

  - by Philippe

  If Jupiter is in the startup my multimonitor setup will fail. Instead of two separate desktops the monitors will be mirrored, one over the other with the smaller notebook-desktop in the larger screen: After each new log-in I have to reset the Display settings in the "System Settings..." dialogue to two not mirrored screens, the changes don't seem to be saved. Given the the entry from xsession-errors /usr/lib/jupiter/scripts/resolutions: line 42: /var/jupiter/available_resolutions_LVDS: Permission denied I assumed that it's coming from Jupiter. Infact, if Jupiter is removed as startup application the desktop settings are fine. Any idea how to solve that issue?

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• Why won't my Internet stay connected?

  - by Aubrey

  I recently updated to Ubuntu 12.04, from Ubuntu 10.04, and my Internet, USB760 Novetel Verizon-Wireless Mobile Broadband, will connect after a minute of me starting the computer up. But after a while it will disconnect and the only way to reconnect it is to restart the computer. Even then, sometimes it won't work. I've also noticed that since I've upgraded the computer, the computer will randomly enter into Power Save mode, and then it will tell me to log back in. I've done nothing to provoke it, other than using the Internet. I was wondering, could the entering into Power Save mode and the Internet disconnecting be somehow connected? I've updated the computer every time it asks me to do so, but it doesn't seem to be helping. If Ubuntu 10.04 would still be supported by next year, I would downgrade. But I have no other choice than to stick with 12.04. Any help would be greatly appreciated! Thanks!

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• Interviewing someone for general unix skills

  - by Christophe Vanfleteren

  How would you test a developer that claims to have *nix shell experience (just to be clear, we don't want to test if someone can develop on *nix, only that they know their way around the command line). I was thinking about making them solve a problem of getting information out of log files, which would involve some basics like cat, grep, cut, ... combined with piping. What other basic knowledge would you ask for? Once again, this isn't for interviewing someone who will develop for *nix systems, and also not for *nix system admins, but just for regular developers that sometimes need to do some work on a *nix system.

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• How can I make the Ubuntu Software Center load?

  - by Kieran

  I launch it and it goes grey for almost immediately. Closing it prompts me to "force close" and no error report is given. I launched it in Terminal and this was the resulting log: 2012-11-23 22:39:25,175 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2012-11-23 22:39:25,179 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True 2012-11-23 22:39:25,409 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file 2012-11-23 22:39:25,412 - softwarecenter.fixme - WARNING - logs to the root logger: '('/usr/lib/python2.7/dist-packages/gi/importer.py', 51, 'find_module')' 2012-11-23 22:39:25,412 - root - ERROR - Could not find any typelib for LaunchpadIntegration 2012-11-23 22:39:25,474 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None

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• tightvncserver on ubuntu 12.04 server with ubuntu-desktop installed no unity

  - by Leon

  The tight vnc server is running but unity does not get loaded. I changed the xstartup to: unset SESSION_MANAGER . /etc/X11/xinit/xinitrc [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources gnome-session & But still no unity. In wich log file can I look for the errors containing the starting of tightvncserver in combination with gnome and unity? Can somone point me at documentation abou tthe loading/starting sequence of Xserver, windows manager etc.? Is this a known issue?

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• Drupal accounts with dead addresses: how to de-activate?

  - by Philippe

  Hi, on my drupal website, there are a lot of users with an invalid email address. I know because, either they have never logged in or their mails bounce. But I have to check manually, which is not good. When a user signs up with an email address, they receive a confirmation email. Is there a way to automatically disable an account if the user does not log in within the first day after receiving this confirmation mail? Alternatively, it would be OK to keep the accounts disabled until the user clicks a link on the confirmation mail. Are there plugins or settings in Drupal to do this?

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• Configure mailserver to make all the mails come to 1 single mailbox

  - by Vinod K

  mailserever domain name is "Vrk.com".. I want to store message sent to "yahoo.com" too...can i do tht.. I have /etc/postfix/virtual in which i have entered.. @yahoo.com root And 1 more thing...i have user named "vinod" in the mail server...now when i address any mails to "[email protected]"...it works....but when i do "[email protected]"...it gives me error saying...this doesnt exist in the the server...but when i send mails to "[email protected]"...it sends the mails (though it goes into the mail.log as an error entry)...it atleast doesnt stop me from sending it...why is that??

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• File manager respawns with ubuntuone

  - by pygator

  Starting Feb 11, my Ubuntu 10.10 desktop respawns FileManager many times(hundreds). You can observe the "Starting File Manager" processes at the bottom of the gnome desktop. I can make this behaviour stop by: System - Preferences - Ubuntu One - Services - uncheck "Files". Can someone walk me though the debug process? Linux 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:48 UTC 2011 i686 GNU/Linux I'm trying to reset the Ubuntu One configuration. I found good information here: https://wiki.ubuntu.com/UbuntuOne/Bugs Look for "ROOT_MISMATCH in syncdaemon.log" After running through the steps to reset and restart UbuntuOne, no more "Starting File Mangager" respawns.

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• Shotwell not available in 11.10

  - by John Speed

  I had used Shotwell happily previously then updated to Natty last week. Despite Shotwell showing on the tool bar on screen, when clicked, nothing happened, and it ignored my SD card when loaded. I read all sorts of remedies and tried everything to no avail. When I next turned on the laptop, Ocelot was available so with nothing to loose, I upgraded again. Still no Shotwell. Tried all the new fixes and now atleast I have the icon pictures but nothing behind it. When I ran the command to load the log file, Shotwell loaded and all my photos are present. Exited programme, and now nothing. Can anyone tell me where I have gone wrong please.

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• IIS throws HTTP Error 503. The service is unavailable after installation of windows 8

  - by Floran

  I was using IIS7.5 on Windows 7. Everything worked great. I then installed Windows 8. The shortcut link to my IIS7.5 stopped working, because all this was apparently moved to a windows.old folder. I had to install IIS8 via the 'turn Windows features on/off'. After I did that, I saw my sites again and everything looked ok, until I browsed to a site and got the error: Service Unavailable HTTP Error 503. The service is unavailable. I restarted IIS, restarted my PC, restarted the single site, but the problem remains. I also tried looking at the event logs. My eventlogs used to be in C:\inetpub\logs\LogFiles\W3SVC4, but I don't see any log of today in there. Maybe that has changed with the new IIS as well? If so, where are the eventlogs now or where can I see where they should be saved?

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• No keyboard input until after GRUB

  - by Dave M G

  I have a computer that I dual boot between Ubuntu 11.10 and Windows 7. I installed Windows first, and Ubuntu second. When I boot, the GRUB menu comes up, showing me the option to select to boot to Ubuntu at the top of the list, and to boot to Windows at the bottom. Unfortunately, as far as I can tell, any key I press on the keyboard (connected by USB) does not get any response, so I can't actually select to boot to anything but Ubuntu (which is the default selection). Once Ubuntu loads and I am at the log in screen, then the keyboard (and mouse) work perfectly normally thereafter. Why would my keyboard not work only during GRUB? And how do I fix it?

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• MSR Issue on 12.1 Enterprise Controllers

  - by Owen Allen

  We've noticed a problem with MSR initialization and synchronization on Enterprise Controllers that are using Java 7u45. If you're running into the issue, these jobs fail with Java errors. Java 7u45 is bundled with Oracle Solaris 11.1 SRU 12, so if you're using that version or if you plan to use it, you should be aware of this issue. There's a simple fix. You can do the fix before upgrading to SRU 12, but you can't do it before you install the Enterprise Controller. First, log on to the Enterprise Controller system and stop the EC using the ecadm command. This command is in the /opt/SUNWxvmoc/bin directory on Oracle Solaris systems and in the /opt/sun/xvmoc/bin directory on Linux systems: ecadm stop -w Then run this command to fix the issue: cacaoadm set-param java-flags=`cacaoadm get-param -v java-flags -i oem-ec | sed 's/Xss256k/Xss384k/'` -i oem-ec And then restart the EC: ecadm start -w Once you apply this fix, you should be set.

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• Prevent Apache restarting automatically after upgrading packages

  - by HorusKol

  Following on from an earlier question: Is there a way to download security updates and notify admin without installing the update? A large number of packages interact with Apache (especially PHP) such that security updates to those packages can cause the server to attempt to restart the service. While my earlier question was answered, I'm now thinking that I need a different solution. So - is there are way to allow security updates to be applied using apt, have an email sent to an administrator, and, most importantly, prevent services from being restarted at the end of the installation/update process? The administrator will then be able to log in and restart the service manually.

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• ZeroBin Is an Encrypted PasteBin Alternative

  - by Jason Fitzpatrick

  ZeroBin is like the heavily armored sibling of PasteBin; You can still paste large chunks of text but that text is encrypted with client-side encryption. PasteBin is great when you need to share snippets of code or log files, the only problem is the service is essentially wide open. Not such a big deal if you’re sharing your XBMC logs on the support forum to get a little help figuring out why your movie list won’t update, but less than idea if you’re sharing more sensitive information. ZeroBin steps in to fill that gap by offering client-side encryption where ZeroBin has no knowledge of the content of your shared text snippets. In addition you can set up the ZeroBin content to self destruct after a set amount of time. Hit up the link below to take ZeroBin for a spin. ZeroBin [via One Thing Well] How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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• VLC unable to open MRL

  - by faizal

  I am trying to play a VCD using : /usr/bin/vlc vcd:// But i get the error below : VLC media player 2.1.4 Rincewind (revision 2.1.4-0-g2a072be) [0x14ec1c8] main interface error: no suitable interface module [0x1486118] main libvlc error: interface "globalhotkeys,none" initialization failed [0x1486118] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. [0x7f815c0009b8] main input error: open of `vcd://' failed [0x7f815c0009b8] main input error: Your input can't be opened [0x7f815c0009b8] main input error: VLC is unable to open the MRL 'vcd://'. Check the log for details. Any way to resolve this ?

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• Facebook and Gmail stop working after 10 minutes

  - by Julia

  I have problem with facebook and gmail only: It works fine and lets me log in, view photos and videos, read new messages, etc. But after 5-10 minuets it doesn't load at all This webpage is not available. The webpage at http://www.facebook.com/ might be temporarily down or it may have moved permanently to a new web address. More information on this error Below is the original error message Error 101 (net::ERR_CONNECTION_RESET): Unknown error After deleting cookies this problem disappears for 5-10 minuets, then I get the same error. It happens with Google Chrome and Firefox. Ping works fine. I have checked System-Preferences-Network Proxy it sets on Default - "Direct Internet Connection". Then I have run test (chrome://net-internals/#tests) and got some FAIL results Use system proxy settings Disable IPv6 host resolving Probe for IPv6 host resolving IPv6 is disabled.

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