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• RTL8192SU-based Wi-Fi adapter disconnects permanently

  - by leventov

  I've already tried all possible (http://ubuntuforums.org/showpost.php?p=10129571&postcount=43) solutions, no progress. I'm in despair. In Windows (on the same machine) this adapter works stably. Device: Trendnet TEW-649UB. System details: Ubuntu 11.10; leventov@leventov-ubuntu:~$ uname -a Linux leventov-ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux leventov@leventov-ubuntu:~$ lsusb ... Bus 002 Device 002: ID 0bda:8172 Realtek Semiconductor Corp. RTL8191S WLAN Adapter ... leventov@leventov-ubuntu:~$ dmesg | grep 8712 #current driver [ 8.146510] r8712u: module is from the staging directory, the quality is unknown, you have been warned. [ 8.147113] r8712u: DriverVersion: v7_0.20100831 [ 8.147124] r8712u: register rtl8712_netdev_ops to netdev_ops [ 8.147127] r8712u: USB_SPEED_HIGH with 4 endpoints [ 8.147478] r8712u: Boot from EFUSE: Autoload OK [ 8.551272] r8712u: CustomerID = 0x0000 [ 8.551275] r8712u: MAC Address from efuse = 00:14:d1:6c:52:19 [ 8.551625] usbcore: registered new interface driver r8712u [ 9.501351] r8712u: Loading firmware from "rtlwifi/rtl8712u.bin" [ 10.160471] r8712u: 1 RCR=0x153f00e [ 10.161241] r8712u: 2 RCR=0x553f00e leventov@leventov-ubuntu:~$ lsmod | grep 8712 r8712u 189049 0 t

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• How do I update the IcedTea Plugin on 12.10?

  - by Brenton Horne

  Whenever I open up the page http://www.runescape.com/game.ws? in google chrome I get the notice, "IcedTea was blocked because it is out of date" and gives me the two options of updating it or running this time. I've gone to the link attached to the option of updating it and its a wikipedia page http://icedtea.classpath.org/wiki/Main_Page that wasn't helpful for me because I didn't know what to download and install. Whenever I click, 'Run this time' it works momentarily but it is prone to have the runescape interface in the browser disappear and be replaced with a black screen.

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• Ubuntu Suspend won't wake by mouse

  - by corsen

  I just installed Ubuntu 11.04 and realized that suspend would not wake by either keyboard or mouse. After following instructions from here: http://ubuntuforums.org/showthread.php?t=1642817 The system will now wake by keyboard. I have a USB mouse it is a logitech G5. Even if I enable all of the USB devices listed in /proc/acpi/wakeup, my computer will still not wake up via mouse. I'd really prefer to wake by mouse instead of keyboard due to cats. Does anyone know why my mouse won't wake the machine even after enabling all USB devices listed? Thanks, Bryan

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• ANTLRWorks 2: Early Access Preview 10

  - by Geertjan

  I took a quick look at how the ANTLRWorks 2 project is getting on... and discovered that today, March 23, the new early access preview 10 has been released: http://www.antlr.org/wiki/display/ANTLR4/1.+Overview Downloaded it immediately and was impressed when browsing through the Java.g file that I also found on the Antlr site: (Click to enlarge the image above.) On the page above, the following enhancements are listed: Add tooltips for rule references Finally fixed the navigator update bug Major improvements to code completion Fix legacy mode Many performance and stability updates I've blogged before about how the developers on the above project consider their code completion to be "scary fast". Some discussions have taken place about how code developed by the ANTLRWorks team could be contributed to the NetBeans project, since NetBeans IDE and ANTLRWorks 2 are both based on the NetBeans Platform.

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• When to reply 400 Bad Request

  - by KajMagnus

  According to www.w3.org, a Web server should reply with status code 400 Bad Request if: "The request could not be understood by the server due to malformed syntax. The client SHOULD NOT repeat the request without modifications" Does that mean only request that violates some HTTP spec? Or does it include a request that my particular Web app thinks is broken? When would you reply 400? For example, if my Web app expects a query string to always include a "function=..." parameter, would you reply code 400 Bad Request or 403 Forbidden? (403 means that "The server understood the request, but is refusing to fulfill it.")

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• How to reverse file ownership and permission settings

  - by pandisvezia

  I installed LAMP and WordPress on my system a week ago. Since I couldn't create Child Themes in WordPress and work with PHP folders for my other projects collocated in var/www without using Nautilus I wanted to solve the permissions issue. I hoped to bring a solution carrying out the commands on this page for my WordPress folder: http://wiki.apache.org/httpd/FileSystemPermissions. This allowed me to play with any file in the folder like creating and modifying .css files through WP Admin, etc. But after a restart I discovered that I can't change DNS settings of my network connections in the list anymore because it is asking me the root password and even though I enter the password it doesn't let me do the action giving "insufficient privileges" error. Can you help me correct the mistake I possibily made during the configuration and, maybe, configure again the permission and ownership settings for var/www/somefolder as it is adviced to be configured under general circumstances? Thanks in advance!

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• Confused about nova-network

  - by neo0

  I'm so sorry because this question doesn't related to Ubuntu. I asked in Openstack forum but this forum is not very active. So I think if someone have experience with Openstack Nova can help me with my problem. I've read some explanations about nova-network and how to configure it like this one from wiki: http://wiki.openstack.org/UnderstandingFlatNetworking I'm confusing about a detail. If every traffic from the instances must go through nova controller node, then why we still need the public interface for nova-compute node? Is it necessary? What happen when a request from outside to an instance. For example I have a controller node and a nova-compute node. In nova-compute node I run an instance with a Wordpress website. Then someone connect to the public IP of this instance. So the request go directly from router to the nova-compute node or from router to controller node then nova-compute node? Thank you!

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• Oracle Solaris 11 Cheat Sheet

  - by Markus Weber

  Need to quickly know, or be reminded about, how to create network configuration profiles in Oracle Solaris 11 ?How to configure VLANS ?How to manipulate Zones ?How to use ZFS shadow migration ? To have those answers, and many more, neatly in front of you, we created this cheat sheet (pdf). Originally developed by Joerg Moellenkamp, the author of the very popular blog c0t0d0s0.org, and of the "Less Known Solaris Features", some more people at Oracle jumped in and added more and more very useful commands to it. And it may keep evolving, so keep checking ! The link to it can also be found on our new Oracle Solaris Evaluation page.

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• Java and web pages

  - by Filippo

  Hello everyone and thank you in advance for the answers. I have a question concerning not how to do something, but with which instruments. Let's say, I want to write a simple application in Java that connects to a news website (e.g. CNN), parses the html document and prints on screen the news. Another example : my application retrieves and prints on screen soccer results from Eurosports. What do I need to do that? External libraries? Or maybe what I'm looking for is already included in JavaEE? Could this be helpful? http://jsoup.org/<< Thank you everyone again and have a nice day.

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• Unity Search Not Working

  - by greggory.hz

  When I attempt a search after hitting Super, the spinner spins, but no results come up once the spinning stops. I'm not sure what changed that caused this. I had a newer kernel installed, but I have since reverted back to the default kernel. I also followed this guide: http://www.webupd8.org/2011/04/how-to-reset-unity-launcher-icons-or.html Alt+F2 does not work. The packages unity-place-applications and unity-place-files are installed. But search still doesn't function correctly.

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• What does /dev/null mean in the shell?

  - by rishiag

  I've started learning bash scripting by using this guide: http://www.tldp.org/LDP/abs/abs-guide.pdf However I got stuck at the first script: cd /var/log cat /dev/null > messages cat /dev/null > wtmp echo "Log files cleaned up." What do lines 2 and 3 do in Ubuntu (I understand cat)? Is it only for other Linux distributions? After running this script as root, the output I get is Log files cleaned up. But /var/log still contains all the files.

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• Did You Know? I'm doing 3 more online seminars with SSWUG!

  - by Kalen Delaney

  As I told you in April , I recorded two more seminars with Stephen Wynkoop, on aspects of Query Processing. The first one will be broadcast on June 30 and the second on August 27. In between, we'll broadcast my Index Internals seminar, on July 23. Workshops can be replayed for up to a week after the broadcast, and you can even buy a DVD of the workshop. You can get more details by clicking on the workshop name, below, or check out the announcement on the SSWUG site at http://www.sswug.org/editorials/default.aspx?id=1948...(read more)

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• Problems in creating click package for native application

  - by Swordfish90

  Hello everyone I've tried may times to package a native click application mainly following this tutorial: http://notyetthere.org/?p=316 The procedure works and I'm able to execute the binaries both on phones and desktops. The problems start when I install the click package. The application is launched but the game is not working (the "gamefield" is not loaded). The only error message that is given is that versions of localstorages are not compatible (that is impossbile, because it never changed). I suspect that the problem is related to apparmor but I have no proof of that. The source code of the application is available here: https://launchpad.net/ubuntu-netwalk Thank you in advance to everyone...

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• Upgrade to 14.04 broke gsettings

  - by zrneely

  I have a cron job which runs every 30 minutes that changes the background image by running this bash script: #!/bin/bash export DISPLAY=:0 export GSETTINGS_BACKEND=dconf wpdir="/home/username/Pictures/wallpapers/" prefix="file://" file=`ls $wpdir | shuf -n 1` gsettings set org.gnome.desktop.background picture-uri "$prefix$wpdir$file" This worked perfectly until I upgraded to 14.04. Now, running the script produces this output: (process:27459): dconf-WARNING **: failed to commit changes to dconf: Could not connect: Connection refused What can I do to fix this? Google didn't turn up any useful results. EDIT: I noticed that running this does change the background displayed on the lock screen, but it does not affect the desktop background.

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• RabbitVCS suddenly stopped working in Nautilus with Ubuntu 11.04

  - by Sander

  A while ago I installed RabbitVCS on Ubuntu 11.04. It then all worked pretty well, but since a few weeks (maybe even more than a month) RabbitVCS suddenly disappeared from the Nautilus context menu. I visited this page: http://wiki.rabbitvcs.org/wiki/support/known-issues and saw some points I could try, but none of them worked out to a working version again. Also this issue Rabbit VCS stopped working after upgrade to 11.10 does not describe the solution for me, so I think it might be something else. I have also tried to reinstall RabbitVCS again from the PPA which was recently updated according to this topic, but no luck. I am still on 11.04 (as I don't like the way Ubuntu is going in newer versions at all) and my Nautilus version is 2.32.2.1 . Is there someone who can help with this one?

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• How to hide/remove "exit, minimize, maximize" bar on top of the application when not maximized, showing only the application/program on the desktop

  - by bigbadbabybear

  I'm an on and off novice ubuntu user, last used 9.04 and installed 11.10 a week ago. What I want to happen, edit unity to suit how I use my computer: Copy the way xmonad (www.xmonad.org) shows its applications and that is that there is no "exit, minimize, maximize" bar on top of the application I've read a few things on how to configure unity using Ubuntu Tweak and MyUnity I want to eventually switch to xmonad but for now it is still too complicated for me even with all the docs & tutorialss it's still too complicated for me & I cannot yet let go of my mouse tl;dr? from this: to this Is this possible? And if it is possible, how?

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• My colleague can't visit our website through her provider after long downtime

  - by Peter Westerlund

  We did a frontpage update some days ago that caused the site to crash. The site was down for several hours. After troubleshooting, we concluded that we needed to cache more content. It had been run too many queries. After solving that and rebooting of server, we here in Sweden and Norway were again able to visit the site. But a colleague in Tunisia couldn't. It seems to work from another internet provider but not her own. What could have happened? And what should we do? Edit: I should add: She is able to visit the site through tunnel at anonymouse.org.

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• Problem installing latest faience theme on ubuntu 14.04

  - by opensas

  I followed these articles to install the latest version of faience theme on ubuntu 14.04 http://www.webupd8.org/2014/06/popular-faience-gtk-gnome-shell-themes.html http://www.noobslab.com/2014/06/faience-theme-is-now-available-for.html And I'm getting the following error: Preparing to unpack .../faience-theme_0.7_all.deb ... Unpacking faience-theme (0.7) over (0.5.4) ... dpkg: error processing archive /var/cache/apt/archives/faience-theme_0.7_all.deb (--unpack): unable to open '/usr/share/themes/Faience-Ocre/gtk-2.0/apps/dummy.png.dpkg-new': No such file or directory No apport report written because the error message indicates an issue on the local system Errors were encountered while processing: /var/cache/apt/archives/faience-theme_0.7_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) that dummy.png.dpkg-new seems a bit suspicious... Is anybody else having the same trouble?

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• Live Webcasts of the Transit of Venus

  - by TATWORTH

  Space.com have published a list of webcams for the Transit of Venus at http://www.space.com/14568-venus-transits-sun-2012-skywatching.htmlLive Webcasts Around the World Here is a list of observatories and organizations providing live webcasts on June 5 of the Venus transit of 2012: NASA webcast from Mauna Kea, Hawaii: http://venustransit.nasa.gov/2012/transit/webcast.php Exploratorium (in San Francisco, Calif.) webcast from Mauna Loa, Hawaii: http://www.exploratorium.edu/venus/ Slooh Space Camera telescope feed from around the world: http://www.slooh.com/transit-of-venus/ Astronomers Without Borders webcast from the Mount Wilson Observatory in California: http://www.astronomerswithoutborders.org/projects/transit-of-venus.htmlI intend to publish a single list later.

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• Are there any open source projects for car engine sound simulation?

  - by Petteri Hietavirta

  I have been thinking how to create realistic sound for a car. The main sound is the engine, then all kind of wind, road and suspension sounds. Are there any open source projects for the engine sound simulation? Simply pitching up the sample does not sound too great. The ideal would be to something that allows me to pick type of the engine (i.e. inline-4 vs v-8), add extras like turbo/supercharger whine and finally set the load and rpm. Edit: Something like http://www.sonory.org/examples.html

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• CLI program to download album art

  - by John Baber

  I'd like to be able to do this: $ pwd /home/$USER/music/ripped_music/Monty_Python-Instant_Record_Collection $ ls 01.The_Executive_Intro.mp3 ... 16.The_Lumberjack_Song.mp3 $ mystery_command_or_script . $ ls 01.The_Executive_Intro.mp3 ... 16.The_Lumberjack_Song.mp3 album_cover.jpg $ Somewhere in the guts of Rhythmbox, totem, etc. this is being done. I'd like to be able to do it myself. I don't need help actually writing a script. I'd really just like to know if there's something like CDDB for album covers. (Scraping albumart.org is the current working solution.)

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• Better control on code updates

  - by yes123

  I will briefly explain my situation. I have a website in PHP, this website is powered by a custom framework + some "plug-in" made ad hoc for it. I am the only developer of this. Until now I just test locally any changes than I upload the php files via FTP. I don't feel confortable anymore with this. The code base has grown quite a lot and I need some sort of system that helps to keep track of changes (line by line) and can restore to an old version easly if something goes wrong. Are there any good solution for this? Note: I never used something like version control or subversion because I think they are too much for this situation (I am the only developer and I just need basic feature) Note2: Something with a nice web interface would be perfect, I can pay for a good service too As now I found: http://beanstalkapp.com/ http://github.com/ http://www.codespaces.com/ http://codesion.com/ https://bitbucket.org/

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• Wifi is connected but internet not working?

  - by Philip

  I have a lenovo x230 running ubuntu 12.04lts. I've been using it just fine for a while, but all of a sudden the internet's stopped working. It's connected to the router just fine (I can see the antenna bars saying it's connected) but when I try to go to a webpage, it's just loading forever. I've tried the fix listed here (http://ubuntuforums.org/showthread.php?t=1985079) but it hasn't done anything (the instructions are a little confusing though). I'm booting windows 7 right now and the internet works just fine when I'm on windows, so I know it must be a problem with ubuntu. I haven't touched any network settings before this problem happened, and I've been using it just fine for months, so I don't know why I'm getting this problem all of a sudden. Oh and I haven't updated anything in a few weeks (you know when the update manager pops up every so often listing all the things there's an update for) so I know it's not some update that broke it.

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• Why do HDFS clusters have only a single NameNode?

  - by grautur

  I'm trying to understand better how Hadoop works, and I'm reading The NameNode is a Single Point of Failure for the HDFS Cluster. HDFS is not currently a High Availability system. When the NameNode goes down, the file system goes offline. There is an optional SecondaryNameNode that can be hosted on a separate machine. It only creates checkpoints of the namespace by merging the edits file into the fsimage file and does not provide any real redundancy. Hadoop 0.21+ has a BackupNameNode that is part of a plan to have an HA name service, but it needs active contributions from the people who want it (i.e. you) to make it Highly Available. from http://wiki.apache.org/hadoop/NameNode So why is the NameNode a single point of failure? What is bad or difficult about having a complete duplicate of the NameNode running as well?

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• HP mini 5102 Ethernet does not work after suspend on Lubuntu 12.10

  - by Marcin

  Ethernet works fine after system is rebooted The onboard card is seen in 'lspci' as: 43:00.0 Ethernet controller: Marvell Technology Group Ltd. Yukon Optima 88E8059 [PCIe Gigabit Ethernet Controller with AVB] (rev 11) After system being suspended the sky2 driver loads but does not enable the NIC. I have noticed that it happens when PC is left suspended for longer period of time (few houres) Trying to reproduce it I have tried to load the sky2 driver with 'modprobe sky2'. Unfortunately typing 'ifconfig -a' for the onboard ethernet adapter does not list the driver once the sky2 driver is loaded. I have searched internet and I found some information about a bug in kernel. Hovewer it was reported in 2010 so I hope it has been fixed. Here it is http://lists.opensuse.org/opensuse-bugs/2010-02/msg01473.html

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