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• WIFI looses connection with AR9285 - have to disconnect / connect to regain internet?

  - by CodyLoco

  I have a G73JW laptop using Ubuntu 12.04. It has an Atheros AR9285 card. While wifi seems to work fine most of the time, about every hour or two it will loose the connection to the internet. The connection will appear to be connected still to the wireless router, but internet access is gone. Disconnecting and reconnecting to the access point solves the problem, as does disabling and reenabling the adapter via the hardware keyboard shortcut. How might this be solved so the connection is stable and doesn't drop? EDIT: It looks like the network dropping isn't related to DNS as it fails either way: codyloco@CodyLoco-Ubuntu:~$ dig askubuntu.com @8.8.8.8 ; <<>> DiG 9.8.1-P1 <<>> askubuntu.com @8.8.8.8 ;; global options: +cmd ;; connection timed out; no servers could be reached codyloco@CodyLoco-Ubuntu:~$ dig askubuntu.com ; <<>> DiG 9.8.1-P1 <<>> askubuntu.com ;; global options: +cmd ;; connection timed out; no servers could be reached Again cycling (disabling / enabling) the adapter corrects the issue.

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• Quadcopters Play Catch [Video]

  - by Jason Fitzpatrick

  Working like a group of hive-minded bees, these quadcopters come off as almost playful with their ball throwing antics. Courtesy of the folks at the Swiss Federal Institute of Technology in Zurich’s Institute for Dynamic Systems and Control, we’re treated to a video of three quadcopters playing catch in the research facility’s Flying Machine Area. They explain the processes demonstrated in the video: This video shows three quadrocopters cooperatively tossing and catching a ball with the aid of an elastic net. To toss the ball, the quadrocopters accelerate rapidly outward to stretch the net tight between them and launch the ball up. Notice in the video that the quadrocopters are then pulled forcefully inward by the tension in the elastic net, and must rapidly stabilize in order to avoid a collision. Once recovered, the quadrotors cooperatively position the net below the ball in order to catch it. Because they are coupled to each other by the net, the quadrocopters experience complex forces that push the vehicles to the limits of their dynamic capabilities. To exploit the full potential of the vehicles under these circumstances requires several novel algorithms, including: HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• 11.10 system crashes for no apparent reason [closed]

  - by varanoid

  I'm relatively new to Linux, and while I know a fair amount about computers and programming, it certainly isn't my specialty. I have a dual boot with Windows 7, and it has been working very well for me until recently. Just randomly the computer will freeze. The last time I was smart enough to keep the System Monitor open when it happened, and it looks like at the time of freezing "bash" and a bunch of other processes that I don't recognize seem to have flooded the memory. So it looks like my memory is getting overloaded and this is what is crashing the system, but I honestly have no idea what could be doing it. Generally I have a bunch of programs running, but they don't take much RAM or CPU: Transmission, Libre Office Writer, Firefox, Empathy, and Banshee. Sometimes I also have Text Editor and Terminal open, but it crashes regardless. When it crashes, it seems that all of the programs are working fine but things like windows, the taskbar, and operations like Alt+Tab just stop working properly or at all. Sometimes the mouse and keyboard freeze and I have to power off manually. Other than that I don't know what the problem is. The only irregularity I've experienced is that I can't download "Debian package management system" even though other updates download fine.

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• Multiple Issues - USB booting Ubuntu 12.04

  - by Pixelishus

  I've been using a Ubuntu 12.04 off a bootable USB stick so I can have a portable OS. Also, OS variety. I've been using it for a while and I'm still have a few issues. First and most annoying, it often lags/freezes. I'm not sure what word you would use for it, windows will often stop working and go dark/not responding from anywhere between 10 seconds to a full minute and on some occasions, even longer. However, the window eventually starts working again. Similarly, sometimes the whole system will freeze, not just the window. The mouse will still move, but nothing will work. No clicking, no menus, not keyboard shortcuts. Again, it will usually start working. I'm liking Ubuntu a lot, but those issues can make it annoying to use sometimes. For example, it will ALWAYS freeze at some point if I try to watching a Youtube video and I'll have to wait for a minute or so until it starts responding, again. Aside from the lag/freezing, anytime I download packages, it will always say "package operation failed" when it's done, though it does seem to download/install. Another issue I'm having is with shutting down. If I open the logout/shutdown menu and click shutdown, it just logs me out and takes me to the login screen. If I try shutting down through the login screen, it won't do anything. As if I didn't even go to it. I've been using the terminal to reboot or shutdown when I need to. I've looked around for answers for all of these problems and still have yet to find a solution that works. Are these just normal issues with USB booting? I haven't installed Ubuntu to any computers, I've always done USB booting.

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• Ubuntu install can't find hard drives

  - by Casey Hungler

  I recently got a Dell Inspiron Special Edition 7720 computer. I am trying to install Ubuntu along side Windows. When I use the WUBI installer, the installation of Ubuntu works as long as I do not boot into Windows; if I boot into Windows, when I go back into Ubuntu, I am given a variety of error messages which claim to have corrupt or missing kernel/root directory, etc. I have been working with this problem for about a week, and have reinstalled Ubuntu MANY times. So far, I have eliminated all of the following problems: Corrupt WUBI installation (Downloaded multiple times, used on other systems), I have tried using a CD and a flash drive, both of which work on other computers. I know that no program within Ubuntu is creating the problem. I know that others have successfully installed Ubuntu on a computer with my operating system (Windows 7 SP1). This is a much shortened version of the original question, which has been up for about 5 days, and included a more detailed description of the problem, but left everyone clueless as to the source of this problem. When I spoke with the Dell service technician who came over today to replace my keyboard, he suggested that the driver for my HDD was so new that it was not compatible with the current version of Ubuntu. His reasoning is as follows: 1) During an install from a flash drive or CD, where I am supposed to get the option to wipe my system or create a dual boot, I get a window that asks me to select a hard drive partition, but none are listed. 2) This model of computer was made public in June of this year, while Ubuntu was released in April Adopting this theory, it would seem to me that the WUBI install fails after booting into Windows because Ubuntu can no longer find the files that it needs to load. Does this theory seem at all plausible to anyone? I just want to install Ubuntu and have it stay on my computer. I don't care how I put it there, I just need it to work, so I would TRULY appreciate any advice or suggestions anyone could give. Thanks so much for your time and support!!!

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• Login Screen hangs after entering password

  - by Ravi

  When I enter my password in the login box nothing happens. It gets stuck. It was running fine earlier. I have installed gnome-panel and cairo-dock, after which, I logged out, logged back in, and choose gnome classic session. I also added a ppa from the webupd8.org to install the themes (link). I opened Ubuntu Tweak tool, and changed the theme to Evolve the whole laptop stopped responding. The keyboard and mouse were unresponsive. So I was forced to do a shut down. Now whenever it starts, I cannot login into Ubuntu. I hear the fan noise, as its spinning very fast, when the laptop freezes.(Probably the CPU is running at 100%). Please help me. How can I login back to Ubuntu? I am using Ubuntu 12.04 and have installed all the latest updates.. EDIT: I want to know how can I delete a folder from the file system using the live CD?

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• Loign Scren hangs after entering password in Ubuntu 12.04

  - by Ravi

  When I enter my password in the login box nothing happens. It is stucked there. It was running fine earlier. Actually, I installed the package gnome-panel and cairo-dock. Then I logged out and selected gnome classic session. Then I added a ppa from the webupd8.org to install the themes(link). I opened Ubuntu Tweak tool. When I changed the theme to Evolve the whole laptop stopped responding. None of my keyboard and mouse was working. So I was forced to do a forced shutdown. Now after restart I cannot login into ubuntu. I hear a loud sound of my laptop fan when the laptop is stucked. (Probably CPU will be at 100% when it stucked). Please help me. How can I login back to ubuntu? I am using ubuntu 12.04 and have installed all the latest updates..

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• Make a basic running sprite effect

  - by PhaDaPhunk

  I'm building my very first game with XNA and i'm trying to get my sprite to run. Everything is working fine for the first sprite. E.g : if I go right(D) my sprite is looking right , if I go left(A) my sprite is looking left and if I don't touch anything my sprite is the default one. Now what I want to do is if the sprite goes Right, i want to alternatively change sprites (left leg, right leg, left leg etc..) xCurrent is the current sprite drawn xRunRight is the first running Sprite and xRunRight1 is the one that have to exchange with xRunRight while running right. This is what I have now : protected override void Update(GameTime gameTime) { float timer = 0f; float interval = 50f; bool frame1 = false ; bool frame2 = false; bool running = false; KeyboardState FaKeyboard = Keyboard.GetState(); // Allows the game to exit if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed) this.Exit(); if ((FaKeyboard.IsKeyUp(Keys.A)) || (FaKeyboard.IsKeyUp(Keys.D))) { xCurrent = xDefault; } if (FaKeyboard.IsKeyDown(Keys.D)) { timer += (float)gameTime.ElapsedGameTime.TotalMilliseconds; if (timer > interval) { if (frame1) { xCurrent = xRunRight; frame1 = false; } else { xCurrent = xRunRight1; frame1 = true; } } xPosition += xDeplacement; } Any ideas...? I've been stuck on this for a while.. Thanks in advance and let me know if you need any other part from the code.

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• Unable to start after 13.04 > 13.10 udate

  - by romainl

  At the end of the update process, clicking on the Restart button had no visible effect whatsoever. After waiting 5 to 10 minutes, I decided to reboot the computer manually. Since then, I rebooted a good dozen times (not with the hope that it would work but with the hope of reading the messages) with the same non-result and the same symptoms: I get the ASCII text-on-purple Ubuntu 13.10 . . . . splash screen with these messages: * Restoring resolver state... [OK] * Starting crash report submission daemon [OK] * Starting CUPS printing spooler/server [OK] Everything disappears. The whole process hangs at a purple screen with the mouse cursor right in the middle. At this point, I'm unable to use the mouse and the keyboard. Booting from a 12.04 CD works perfectly, Disk Utility says that all my disks are OK and I can mount my main partition without problems. Something obviously went wrong at the end of the upgrade but I have no idea what. I'd appreciate any pointer. This is the kind of moment where you really think "Next time, I'll separate my /home partition for sure". My machine is an aging but working Dell Inspiron 530 with an Intel Core Duo E2160 processor, 2 GHz of RAM and an ATI Radeon HD3650 video card. Thanks.

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• Predictive firing (in a tile-based game)

  - by n00bster

  I have a (turn-based) tile-based game, in which you can shoot at entities. You can move around with mouse and keyboard, it's all tile-based, except that bullets move "freely". I've got it all working just fine except that when I move, and the creatures shoot towards the player, they shoot towards the previous tiles.. resulting in ugly looking "miss hits" or lag. I think I need to implement some kind of predictive firing based on the bullet speed and the distance, but I don't quite know how to implement such a thing... Here's a simplified snip of my firing code. class Weapon { public void fire(int x, int y) { ... ... ... Creature owner = getOwner(); Tile targetTile = Zone.getTileAt(x, y); float dist = Vector.distance(owner.getCenterPosition(), targetTile.getCenterPosition()); Bullet b = new Bullet(); b.setPosition(owner.getCenterPosition()); // Take dist into account in the duration to get constant speed regardless of distance float duration = dist / 600f; // Moves the bullet to the centre of the target tile in the given amount of time (in seconds) b.moveTo(targetTile.getCenterPosition(), duration); // This is what I'm after // Vector v = predict the position // b.moveTo(v, duration); Zone.add(bullet); // Now the bullet gets "ticked" and moveTo will be implemented } } Movement of creatures is as simple as setting the position variable. If you need more information, just ask.

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• System always halt

  - by user211964

  Good day, Thanks Bruno for the prompt response. First sorry for my bad writing. I'll try to clarify my problem. Now my system already update to version 13.10. The problem is my system always put on stop whenever there is no activity. Example: I open terminal then execute "sudo apt-get update" then I leave my laptop away, the update stop at 20%. After I move my mouse then the update continue. When I watch a movie using vlc. Play the movie and change to full screen. After a while like 30-40 seconds the movie pause, and again after I move my mouse or hit any button on my keyboard the movie continue to play. I downloading torrent file, a big file, I leave my laptop the whole night, the next morning the downloading just stop. the problem my laptop cannot be on idle. means when I downloading a file or updating my system I just cannot leave my laptop away. I have to kept my laptop busy like surfing the internet...playing games etc.

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• My feenix nascita mouse isn't moving my cursor. Ubuntu version appears to not matter. How do I debug this, and get the mouse working?

  - by NullVoxPopuli

  I had 13.04, upgraded to 13.10, and did a fresh install of 13.10, no luck. Any ideas? Just tail -f'd my syslog and plugged in the mouse. here is what I got: Oct 26 16:15:50 Orithyia kernel: [83369.618365] usb 1-1.5.2: new full-speed USB device number 6 using ehci-pci Oct 26 16:15:50 Orithyia kernel: [83369.718913] usb 1-1.5.2: New USB device found, idVendor=04d9, idProduct=a081 Oct 26 16:15:50 Orithyia kernel: [83369.718919] usb 1-1.5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Oct 26 16:15:50 Orithyia kernel: [83369.718921] usb 1-1.5.2: Product: USB Gaming Mouse Oct 26 16:15:50 Orithyia kernel: [83369.718924] usb 1-1.5.2: Manufacturer: Holtek Oct 26 16:15:50 Orithyia kernel: [83369.722486] input: Holtek USB Gaming Mouse as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5.2/1-1.5.2:1.0/input/input13 Oct 26 16:15:50 Orithyia kernel: [83369.722786] hid-generic 0003:04D9:A081.0004: input,hidraw3: USB HID v1.10 Keyboard [Holtek USB Gaming Mouse] on usb-0000:00:1a.0-1.5.2/input0 Oct 26 16:15:50 Orithyia kernel: [83369.729362] hid-generic 0003:04D9:A081.0005: usage index exceeded Oct 26 16:15:50 Orithyia kernel: [83369.729366] hid-generic 0003:04D9:A081.0005: item 0 2 2 2 parsing failed Oct 26 16:15:50 Orithyia kernel: [83369.729379] hid-generic: probe of 0003:04D9:A081.0005 failed with error -22 Oct 26 16:15:50 Orithyia kernel: [83369.731759] hid-generic 0003:04D9:A081.0006: hiddev0,hidraw4: USB HID v1.10 Device [Holtek USB Gaming Mouse] on usb-0000:00:1a.0-1.5.2/input2 Oct 26 16:15:50 Orithyia mtp-probe: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5.2" Oct 26 16:15:50 Orithyia mtp-probe: bus: 1, device: 6 was not an MTP device So, I see it did see it is a mouse... but the cursor doesn't move when I move the mouse. Not sure where to debug from here.

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• Mouse freezes for User Account but not guest session

  - by Rosie

  this question has been asked before but there wasn't an answer. The mouse on my computer freezes whenever I log in to my User Account, a few seconds after, just before the account opens. The keyboard still works, and programs seem to work as normal. If I log out, the mouse starts to work again. If I log in as a guest, the mouse works fine throughout. I have tried restarting, shutting down, which hasn't resolved the problem. Just after the problem started, I logged in as a guest and tried to open Firefox, but although I haven't logged in as a guest for ages, there was a message saying that Firefox couldn't be opened as it was already running. Could this have been in my main account? Do you know how I can unfreeze the mouse? Is it the same procedure that is recommended on other questions? I am extremely untechnical, and a friend did all the ubuntu installation. So a very detailed step by step would be appreciated if I have to use code to fix this.

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• How can I activate a Panel-icon via a script (or get its screen co-ordinates; to click it)?

  - by fred.bear

  This question is in the context of Lucid 10.04 desktop (ie. no Unity). I do most screen navigation via the keyboard (not the mouse), so I'm looking for a script solution to re-activating an app which has been "minimized" to the Panel's Notification Area. I'll use Skype as an example. wmctrl allows me enough access to normally-minimized windows, but when Skype is "minimized" to the Notification Area, it simply goes "off the radar" as far as wmctrl is concerned. Bearing in mind that icon positions in the Notification Area can vary, is there some way to determine the screen co-ordinates of Skype's Panel icon, so I can "click" it using xdotool (or a similar utility)? ...or maybe there is a more direct way to activate the "dormant" Skype? ... (and I don't mean the mouse ;) Here is the script, so far. Hopefully it will make clear what I'm trying to do: #!/bin/bash procname="skype-wrapper" windmask="Skype™" if [[ $(pgrep -x -n -c "$procname") == 1 ]] ; then wintitle="$(wmctrl -l |grep "$windmask" |head -n 1 |sed -n "s/^.\+${HOSTNAME} \(.*\)/\1/p")" if [ "$wintitle" = "" ] ; then echo "Click on Skype's Panel-icon to show the main window" ############################################################### # How can I find the screen co-ordinates of Skype's Panel Icon ############################################################### else # Skype is running, and has (at least) one visible window which matches $windmask. Activate it. wmctrl -a "$wintitle" fi else # The process is not currently running. Start it. ("$procname" &) fi

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• How to Boot or "enter" into ubnutu 11.04 (Natty Narwhall) on PS3 after installing it?

  - by Xdm

  After failing to install ubuntu 11.04 Desktop version (burned on a dvd, because iso's file size was 726 Mb), in tried the alternate version (about 686 Mb) which i burned into a CD. During the installation process, i manually partitioned the hard drive using ext3. After the installation, the CD ejects itself and i hit "continue". In the k boot prompt i hit "enter" on my the keyboard. I see i welcome message in a dark background (a kind of full screen terminal/console called CLI i think) and was asked to enter my user name and password. After that, instead of booting into the beautiful desktop of Ubuntu, i saw this: ubuntu@my_name$ It was like a line of command i think, where you can use "sudo" commands. It is called a non-graphic mode i think. My my REAL problem is to enter Ubuntu 11.04 with the chocolate-colored background and the African music drum. I tried many commands to boot into the graphic mode of the system such as Ctr+Alt+F7 but nothing happened. In this case, i just saw numbers showing available blocks. I DON'T UNDERSTAND. I also tried startx and sudo startx without result. I DO bought a PS3 BOTH for gaming and for Ubuntu because i can't afford buying a PC. Please help me with my trouble dear Ubuntu 11.04 users. I am counting on you. All the best Xdm

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• "drm:[drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC6]" during install

  - by Warez J. Coxtrong

  I have a desktop PC which I built a while back. It has an Athlon XP 2500+, 2.5GB RAM, and an Nvidia (PNY Verto) Geforce 6200. I removed the CD drive to add another hard drive so I install from a USB flash drive. When I try to install 12.04 it seems to work just fine. The GUI boots up and wifi even connects to my router. I go through the language screen, the partition screen, the keyboard screen, the location screen, and the import my Windows settings screen just fine. But as soon as I'm done with all that the next screen goes black and displays this message: drm:[drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC6] Since the GUI starts just fine earlier during the install, I know I shouldn't be having any display problems, but I am. How do I get Ubuntu to install properly? I have four IDE hard drives, all Western Digital: a 250GB, a 160GB, a 40GB occupied by Windows XP, and a 120GB that I'm trying to use for Ubuntu. 3GB of the 120GB drive are formatted for swap. I have checked the MD5sum of install image file and it all matches up. d791352694374f1c478779f7f4447a3f ubuntu-12.04-desktop-i386.iso

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• How to get the level and position of the player from an extern program? [on hold]

  - by user3727174

  I want to write a program that needs the current level and position of the player (primary single player). This should work for potentially every game installed and running on the computer my program is running on. The data I need is basically one integer value for the level (if there are any) and three integer values for x, y and optimal z for the position of the player. In which relation/scale or where the null point is does not matter, because this information is going to be interpreted game dependent, I will use this information to read information out of a database created for the game currently running. Currently I'm using C++, but if there is a better option for Java I´m willing to port my program. My thoughs so far are: make a mod for every game that should be supported, get the position/level from there, write this information to the disk and read it from my program tracking mouse/keyboard events and reconstructing the movement won't work Are there any general APIs for something like this? Any Tool to find this data? Or maybe engines that provide APIs to get this data directly from the game?

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• What do you consider standard job perks? [closed]

  - by reseter

  What does a company need to offer you (apart from a fat pay cheque) for you to work for them? I am aware of this question, which is from an employer's perspective. I am interested in your views as employees. To get the discussion started, here is a list off the top of my head (not in any particular order): High-end computer with a huge screen or two. The best software tool money can buy as per Joel's test). That isn't too much to ask given many of the best tools are free (think git). Flexibility is a bonus- if a particular platform/ piece of software is not absolutely required, I would like to pick my OS and IDE. A quality chair Quiet workspace. Open plan is fine as long as there are meeting rooms so that there is no constant chatter going on around me. Spacious workspace. I would rather have more than three inches between my mouse and the person next to me's keyboard. Food and drink at work. Many companies these days have fruit baskets, biscuits, etc available to their employees, some even offer free lunch. Education. If my employer wants my skills to stay up-to-date, they should at the very least understand I need time to learn. If they want to pay for my books and conference registration fees, I am more than happy to accept. Other options include organizing internal knowledge exchange days or inviting speakers from outside. Flexible hours/ option to work from home is a bonus

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• Google Code C++ [closed]

  - by JacKeown

  I was on this website: http://code.google.com/edu/languages/cpp/basics/getting-started.html#learn-by-example and I saw this code: // Description: Illustrate the use of cin to get input // and how to recover from errors. #include <iostream> using namespace std; int main() { int input_var = 0; // Enter the do while loop and stay there until either // a non-numeric is entered, or -1 is entered. Note that // cin will accept any integer, 4, 40, 400, etc. do { cout << "Enter a number (-1 = quit): "; // The following line accepts input from the keyboard into // variable input_var. // cin returns false if an input operation fails, that is, if // something other than an int (the type of input_var) is entered. if (!(cin >> input_var)) { cout << "Please enter numbers only." << endl; cin.clear(); cin.ignore(10000,'\n'); } if (input_var != -1) { cout << "You entered " << input_var << endl; } } while (input_var != -1); cout << "All done." << endl; return 0; } I was wondering... what is the significance of cin.clear() and cin.ignore() ...and also why the 10000 and /n parameters are necessary...?...

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• How do I have an arrow follow different height parabolas depending on how long the player holds down a key?

  - by Moondustt

  i'm trying to throw an arrow in my game, but i'm having a hard time trying to realize how to make a good parabola. What I need: The more you hold "enter" stronger the arrow goes. The arrow angle will be always the same, 45 degrees. This is what I have already have: private float velocityHeld = 1f; protected override void Update(GameTime gameTime) { private void GetKeyboardEvent() { if (Keyboard.GetState().IsKeyDown(Keys.Enter) && !released) { timeHeld += velocityHeld; holding = true; } else { if (holding) { released = true; holding = false; lastTimeHeld = timeHeld; } } } if (released && timeHeld > 0) { float alpha = MathHelper.ToRadians(45f); double vy = timeHeld * Math.Sin(alpha); double vx = timeHeld * Math.Cos(alpha); ShadowPosition.Y -= (int)vy; ShadowPosition.X += (int)vx; timeHeld -= velocityHeld; } else { released = false; } } My question is, what do I need to do to make the arrow to go bottom as it loses velocity (timeHeld) to make a perfect parabola?

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• multiple puppet masters

  - by Oli

  I would like to set up an additional puppet master but have the CA server handled by only 1 puppet master. I have set this up as per the documentation here: http://docs.puppetlabs.com/guides/scaling_multiple_masters.html I have configured my second puppet master as follows: [main] ... ca = false ca_server = puppet-master1.test.net I am using passenger so I am a bit confused how the virtual-host.conf file should look for my second puppet-master2.test.net. Here is mine (updated as per Shane Maddens answer): LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-3.0.18/ext/apache2/mod_passenger.so PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-3.0.18 PassengerRuby /usr/bin/ruby Listen 8140 <VirtualHost *:8140> ProxyPassMatch ^/([^/]+/certificate.*)$ https://puppet-master1.test.net:8140/$1 SSLEngine on SSLProtocol -ALL +SSLv3 +TLSv1 SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP SSLCertificateFile /var/lib/puppet/ssl/certs/puppet-master2.test.net.pem SSLCertificateKeyFile /var/lib/puppet/ssl/private_keys/puppet-master2.test.net.pem #SSLCertificateChainFile /var/lib/puppet/ssl/ca/ca_crt.pem #SSLCACertificateFile /var/lib/puppet/ssl/ca/ca_crt.pem # If Apache complains about invalid signatures on the CRL, you can try disabling # CRL checking by commenting the next line, but this is not recommended. #SSLCARevocationFile /var/lib/puppet/ssl/ca/ca_crl.pem SSLVerifyClient optional SSLVerifyDepth 1 # The `ExportCertData` option is needed for agent certificate expiration warnings SSLOptions +StdEnvVars +ExportCertData # This header needs to be set if using a loadbalancer or proxy RequestHeader unset X-Forwarded-For RequestHeader set X-SSL-Subject %{SSL_CLIENT_S_DN}e RequestHeader set X-Client-DN %{SSL_CLIENT_S_DN}e RequestHeader set X-Client-Verify %{SSL_CLIENT_VERIFY}e DocumentRoot /etc/puppet/rack/public/ RackBaseURI / <Directory /etc/puppet/rack/> Options None AllowOverride None Order allow,deny allow from all </Directory> </VirtualHost> I have commented out the #SSLCertificateChainFile, #SSLCACertificateFile & #SSLCARevocationFile - this is not a CA server so not sure I need this. How would I get passenger to work with these? I would like to use ProxyPassMatch which I have configured as per the documentation. I don't want to specify a ca server in every puppet.conf file. I am getting this error when trying to get create a cert from a puppet client pointing to the second puppet master server (puppet-master2.test.net): [root@puppet-client2 ~]# puppet agent --test Error: Could not request certificate: Could not intern from s: nested asn1 error Exiting; failed to retrieve certificate and waitforcert is disabled On the puppet client I have this [main] server = puppet-master2.test.net What have I missed? -- update Here is a new virtual host file on my secondary puppet master. Is this correct? I have SSL turned off? LoadModule passenger_module /usr/lib/ruby/gems/1.8/gems/passenger-3.0.18/ext/apache2/mod_passenger.so PassengerRoot /usr/lib/ruby/gems/1.8/gems/passenger-3.0.18 PassengerRuby /usr/bin/ruby # you probably want to tune these settings PassengerHighPerformance on PassengerMaxPoolSize 12 PassengerPoolIdleTime 1500 # PassengerMaxRequests 1000 PassengerStatThrottleRate 120 RackAutoDetect Off RailsAutoDetect Off Listen 8140 <VirtualHost *:8140> SSLEngine off ProxyPassMatch ^/([^/]+/certificate.*)$ https://puppet-master1.test.net:8140/$1 # Obtain Authentication Information from Client Request Headers SetEnvIf X-Client-Verify "(.*)" SSL_CLIENT_VERIFY=$1 SetEnvIf X-SSL-Client-DN "(.*)" SSL_CLIENT_S_DN=$1 DocumentRoot /etc/puppet/rack/public/ RackBaseURI / <Directory /etc/puppet/rack/> Options None AllowOverride None Order allow,deny allow from all </Directory> </VirtualHost> Cheers, Oli

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• Tunnel is up but cannot ping directly connected network

  - by drmanalo

  We configured a site-to-site VPN and here is the topology. I control the network on the left but not the one on the right. All devices in our network has public IPs. Server---ASA5505---Cisco887======Internet=====ASA5510---devices I can see the tunnel is up and can do extended ping using a loopback interface. From the 10.175 and 10.165 networks, they can also ping my loopback address. I can also dial in using a Cisco VPN client, and can connect to the devices on the right. #show crypto session Crypto session current status Interface: Vlan3 Profile: xxx-profile Session status: UP-ACTIVE Peer: 213.121.x.x port 500 IKEv1 SA: local 77.245.x.x/500 remote 213.121.x.x/500 Active IPSEC FLOW: permit ip 10.0.20.0/255.255.255.240 10.175.0.0/255.255.128.0 Active SAs: 0, origin: crypto map IPSEC FLOW: permit ip 10.0.20.0/255.255.255.240 10.165.0.0/255.255.192.0 Active SAs: 2, origin: crypto map #ping 10.165.29.39 source loopback 2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.165.29.39, timeout is 2 seconds: Packet sent with a source address of 10.0.20.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 16/17/20 ms My problem is the devices on the right cannot reach my server. They could only ping the loopback address and nothing else. I'm pasting some diagnostics related to routing thinking perhaps routing is my issue. I can paste all the running-config on my side of network if needed. #show ip int brief Interface IP-Address OK? Method Status Protocol ATM0 unassigned YES NVRAM administratively down down Ethernet0 unassigned YES NVRAM administratively down down FastEthernet0 unassigned YES unset up up connected to ASA FastEthernet1 unassigned YES unset administratively down down FastEthernet2 unassigned YES unset administratively down down FastEthernet3 unassigned YES unset up up Loopback1 10.0.20.65 YES NVRAM up up Loopback2 10.0.20.1 YES NVRAM up up Virtual-Template1 77.245.x.x YES unset up down Virtual-Template2 77.245.x.x YES unset up down Vlan1 unassigned YES unset down down Vlan3 77.245.x.x YES NVRAM up up connected to the Internet #show run | section ip route ip route 0.0.0.0 0.0.0.0 77.245.x.x ip route 213.121.240.36 255.255.255.255 Vlan3 #show access-list Extended IP access list 102 10 permit ip 10.0.20.0 0.0.0.15 10.175.0.0 0.0.127.255 (3332 matches) 20 permit ip 10.0.20.0 0.0.0.15 10.165.0.0 0.0.63.255 (3498 matches) #show vlan-switch VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active 3 VLAN0003 active Fa0, Fa1, Fa2, Fa3 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup #show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP + - replicated route, % - next hop override Gateway of last resort is 77.245.x.x to network 0.0.0.0 S* 0.0.0.0/0 [1/0] via 77.245.x.x 10.0.0.0/8 is variably subnetted, 5 subnets, 3 masks C 10.0.20.0/28 is directly connected, Loopback2 L 10.0.20.1/32 is directly connected, Loopback2 C 10.0.20.64/28 is directly connected, Loopback1 L 10.0.20.65/32 is directly connected, Loopback1 S 10.165.0.0/18 [1/0] via 213.121.x.x 77.0.0.0/8 is variably subnetted, 3 subnets, 3 masks S 77.0.0.0/8 [1/0] via 77.245.x.x C 77.245.x.x/29 is directly connected, Vlan3 L 77.245.x.x/32 is directly connected, Vlan3 213.121.x.0/32 is subnetted, 1 subnets S 213.121.x.x is directly connected, Vlan3 I read some of the posts here which lead to NATing issue but I'not sure of my next step. Should I translate my public address to private and route it to the loopback address? (only guessing) CISCO VPN site to site Site-to-Site VPN between two ASA 5505s only working in one direction Hope someone could help. Thanks in advance!

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• broadcom 5722 NIC not installed on Ubuntu Server, although driver present

  - by Bastien

  Hello, I just installed Ubuntu Server 10.04 LTS, running kernel 2.6.32-24-server, on a brand new Dell T110 server, supposedly fully compatible with Ubuntu Server. I have two NICs: one ONBOARD, the other additional on PCI. both of them are Broadcom netXtreme 5572. on the first boot of the system, I could see both cards as eth0 and eth1 (with ifconfig) I configured eth0 as static IP (as planned), and did not configure eth1. after rebooting, one of the two NICs "disappeared": it does not appear in ifconfig at all. the one that disappeared is the ONBOARD one. I investigated a bit and found the following things: the card is SEEN, but not "installed", it appears as "UNCLAIMED" in lshw: *-network UNCLAIMED description: Ethernet controller product: NetXtreme BCM5722 Gigabit Ethernet PCI Express vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:04:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress cap_list configuration: latency=0 resources: memory:df9f0000-df9fffff *-network description: Ethernet interface product: NetXtreme BCM5722 Gigabit Ethernet PCI Express vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:05:00.0 logical name: eth0 version: 00 serial: 00:10:18:60:23:64 size: 100MB/s capacity: 1GB/s width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.102 duplex=full firmware=5722-v3.09 ip=10.129.167.25 latency=0 link=yes multicast=yes port=twisted pair speed=100MB/s resources: irq:35 memory:dfaf0000-dfafffff so I checked my dmesg and found a few strange lines, showing, there actually is a problem bringing up this card: [ 3.737506] tg3: Could not obtain valid ethernet address, aborting. [ 3.737527] tg3 0000:04:00.0: PCI INT A disabled [ 3.737535] tg3: probe of 0000:04:00.0 failed with error -22 [ 3.737553] alloc irq_desc for 17 on node -1 [ 3.737555] alloc kstat_irqs on node -1 [ 3.737560] tg3 0000:05:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 3.737566] tg3 0000:05:00.0: setting latency timer to 64 [ 3.793529] eth0: Tigon3 [partno(BCM95722A2202G) rev a200] (PCI Express) MAC address 00:10:18:60:23:64 [ 3.793532] eth0: attached PHY is 5722/5756 (10/100/1000Base-T Ethernet) (WireSpeed[1]) [ 3.793534] eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1] [ 3.793536] eth0: dma_rwctrl[76180000] dma_mask[64-bit] that actually shows that one NIC is recognized, the other is not. I researched a bit more, with lspci -v: 04:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet PCI Express Subsystem: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet PCI Express Flags: fast devsel, IRQ 16 Memory at df9f0000 (64-bit, non-prefetchable) [size=64K] Capabilities: [48] Power Management version 3 Capabilities: [50] Vital Product Data <?> Capabilities: [58] Vendor Specific Information <?> Capabilities: [e8] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable- Capabilities: [d0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting <?> Capabilities: [13c] Virtual Channel <?> Capabilities: [160] Device Serial Number 00-00-00-fe-ff-00-00-00 Kernel modules: tg3 05:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet PCI Express Subsystem: Broadcom Corporation NetXtreme BCM5722 Gigabit Ethernet PCI Express Flags: bus master, fast devsel, latency 0, IRQ 35 Memory at dfaf0000 (64-bit, non-prefetchable) [size=64K] Expansion ROM at <ignored> [disabled] Capabilities: [48] Power Management version 3 Capabilities: [50] Vital Product Data <?> Capabilities: [58] Vendor Specific Information <?> Capabilities: [e8] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable+ Capabilities: [d0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting <?> Capabilities: [13c] Virtual Channel <?> Capabilities: [160] Device Serial Number 64-23-60-fe-ff-18-10-00 Capabilities: [16c] Power Budgeting <?> Kernel driver in use: tg3 Kernel modules: tg3 here I could see that the MAC address is 00-00-00-FE-FF-00-00-00, which, according to some forum posts on several websites, could be an issue. I've researched everything I could on the net, and found out several people having slightly comparable issues, but they usually involve different HW, and do not provide a proper explanation / solution... I would appreciate if anyone around here has some info to share ! thanks

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• How Do I Enable My Ubuntu Server To Host Various SSL-Enabled Websites?

  - by Andy Ibanez

  Actually, I Have looked around for a few hours now, but I can't get this to work. The main problem I'm having is that only one out of two sites works. I have my website which will mostly be used for an app. It's called atajosapp.com . atajosapp.com will have three main sites: www.atajosapp.com <- Homepage for the app. auth.atajosapp.com <- Login endpoint for my API (needs SSL) api.atajosapp.com <- Main endpoint for my API (needs SSL). If you attempt to access api.atajosapp.com it works. It will throw you a 403 error and a JSON output, but that's fully intentional. If you try to access auth.atajosapp.com however, the site simply doesn't load. Chrome complains with: The webpage at https://auth.atajosapp.com/ might be temporarily down or it may have moved permanently to a new web address. Error code: ERR_TUNNEL_CONNECTION_FAILED But the website IS there. If you try to access www.atajosapp.com or any other HTTP site, it connects fine. It just doesn't like dealing with more than one HTTPS websites, it seems. The VirtualHost for api.atajosapp.com looks like this: <VirtualHost *:443> DocumentRoot /var/www/api.atajosapp.com ServerName api.atajosapp.com SSLEngine on SSLCertificateFile /certificates/STAR_atajosapp_com.crt SSLCertificateKeyFile /certificates/star_atajosapp_com.key SSLCertificateChainFile /certificates/PositiveSSLCA2.crt </VirtualHost> auth.atajosapp.com Looks very similar: <VirtualHost *:443> DocumentRoot /var/www/auth.atajosapp.com ServerName auth.atajosapp.com SSLEngine on SSLCertificateFile /certificates/STAR_atajosapp_com.crt SSLCertificateKeyFile /certificates/star_atajosapp_com.key SSLCertificateChainFile /certificates/PositiveSSLCA2.crt </VirtualHost> Now I have found many websites that talk about possible solutions. At first, I was getting a message like this: _default_ VirtualHost overlap on port 443, the first has precedence But after googling for hours, I managed to solve it by editing both apache2.conf and ports.conf. This is the last thing I added to ports.conf: <IfModule mod_ssl.c> NameVirtualHost *:443 # SSL name based virtual hosts are not yet supported, therefore no # NameVirtualHost statement here NameVirtualHost *:443 Listen 443 </IfModule> Still, right now only api.atajosapp.com and www.atajosapp.com are working. I still can't access auth.atajosapp.com. When I check the error log, I see this: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366) I don't know what else to do to make both sites work fine on this. I purchased a Wildcard SSL certificate from Comodo that supposedly secures *.atajosapp.com, so after hours trying and googling, I don't know what's wrong anymore. Any help will be really appreciated. EDIT: I just ran the apachectl -t -D DUMP_VHOSTS command and this is the output. Can't make much sense of it...: root@atajosapp:/# apachectl -t -D DUMP_VHOSTS apache2: Could not reliably determine the server's fully qualified domain name, using atajosapp.com for ServerName [Thu Nov 07 02:01:24 2013] [warn] NameVirtualHost *:443 has no VirtualHosts VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: *:443 is a NameVirtualHost default server api.atajosapp.com (/etc/apache2/sites-enabled/api.atajosapp.com:1) port 443 namevhost api.atajosapp.com (/etc/apache2/sites-enabled/api.atajosapp.com:1) port 443 namevhost auth.atajosapp.com (/etc/apache2/sites-enabled/auth.atajosapp.com:1) *:80 is a NameVirtualHost default server atajosapp.com (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost atajosapp.com (/etc/apache2/sites-enabled/000-default:1)

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• Determining cause of high NFS/IO utilization without iotop

  - by Matt

  I have a server that is doing an NFSv4 export for user's home directories. There are roughly 25 users (mostly developers/analysts) and about 40 servers mounting the home directory export. Performance is miserable, with users often seeing multi-second lags for simple commands (like ls, or writing a small text file). Sometimes the home directory mount completely hangs for minutes, with users getting "permission denied" errors. The hardware is a Dell R510 with dual E5620 CPUs and 8 GB RAM. There are eight 15k 2.5” 600 GB drives (Seagate ST3600057SS) configured in hardware RAID-6 with a single hot spare. RAID controller is a Dell PERC H700 w/512MB cache (Linux sees this as a LSI MegaSAS 9260). OS is CentOS 5.6, home directory partition is ext3, with options “rw,data=journal,usrquota”. I have the HW RAID configured to present two virtual disks to the OS: /dev/sda for the OS (boot, root and swap partitions), and /dev/sdb for the home directories. What I find curious, and suspicious, is that the sda device often has very high utilization, even though it only contains the OS. I would expect this virtual drive to be idle almost all the time. The system is not swapping, according to "free" and "vmstat". Why would there be major load on this device? Here is a 30-second snapshot from iostat: Time: 09:37:28 AM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 44.09 0.03 107.76 0.13 607.40 11.27 0.89 8.27 7.27 78.35 sdb 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 sdb1 0.00 2616.53 0.67 157.88 2.80 11098.83 140.04 8.57 54.08 4.21 66.68 dm-0 0.00 0.00 0.03 151.82 0.13 607.26 8.00 1.25 8.23 5.16 78.35 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 dm-3 0.00 0.00 0.67 2774.84 2.80 11099.37 8.00 474.30 170.89 0.24 66.84 Looks like iotop is the ideal tool to use to sniff out these kinds of issues. But I'm on CentOS 5.6, which doesn't have a new enough kernel to support that program. I looked at Determining which process is causing heavy disk I/O?, and besides iotop, one of the suggestions said to do a "echo 1 /proc/sys/vm/block_dump". I did that (after directing kernel messages to tempfs). In about 13 minutes I had about 700k reads or writes, roughly half from kjournald and the other half from nfsd: # egrep " kernel: .*(READ|WRITE)" messages | wc -l 768439 # egrep " kernel: kjournald.*(READ|WRITE)" messages | wc -l 403615 # egrep " kernel: nfsd.*(READ|WRITE)" messages | wc -l 314028 For what it's worth, for the last hour, utilization has constantly been over 90% for the home directory drive. My 30-second iostat keeps showing output like this: Time: 09:36:30 PM Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sda1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda2 0.00 6.46 0.20 11.33 0.80 71.71 12.58 0.24 20.53 14.37 16.56 sdb 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 sdb1 137.29 7.00 549.92 3.80 22817.19 43.19 82.57 3.02 5.45 1.74 96.32 dm-0 0.00 0.00 0.20 17.76 0.80 71.04 8.00 0.38 21.21 9.22 16.57 dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 dm-2 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.81 dm-3 0.00 0.00 687.47 10.80 22817.19 43.19 65.48 4.62 6.61 1.43 99.82

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