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• Virtualbox shared folder mount from fstab fails; works once bootup is complete

  - by Ben

  I've got Ubuntu 13.10 installed in Virtualbox 4.3. The host machine is Windows. I have a couple of Virtualbox shared folders being mounted by /etc/fstab. Until recently this setup worked just fine, but after upgrading from Ubuntu 13.04 and Virtualbox 4.2 (at essentially the same time) the fstab mounting stopped working. I get the following error during boot: An error occurred while mounting /home/benme/Documents. keys:Press S to skip mounting or M for manual recovery Pressing M for manual recovery and then trying to mount manually also fails: root@benme-vb:~# cd /home/benme root@benme-vb:/home/benme# mount Documents /sbin/mount.vboxsf: mounting failed with the error: No such device But if I instead skip mounting during boot, wait for Unity to start and then mount manually in a shell, everything works fine: benme-vb ~ % ls Documents benme-vb ~ % sudo mount Documents [sudo] password for benme: benme-vb ~ % ls Documents # actual file list omitted Note that when I mount manually I'm letting mount take all the options from /etc/fstab, and it works. This suggests to me that it's some sort of timing issue, where Virtualbox isn't "ready" to provide the shared file mounts at the point /etc/fstab mounts are run during bootup. Here's the fstab line, just for completeness: Documents /home/benme/Documents vboxsf uid=benme,gid=benme,dmode=774,fmode=664 0 0 Is there something I can do about this from the Ubuntu side? Or does anyone happen to know more about this from the Virtualbox angle? I've found an old report on the Virtualbox bug-tracker with identical symptoms, but in that case the user had updated Virtualbox without updating their guest additions and resolving that fixed the problem; this isn't happening here, I've definitely got the 4.3 guest additions installed.

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• Problems connecting Centos on VMware player to the network using bridged connection.

  - by Sakin

  Hi, I installed CentOs on VMware Player 3.0.1 running on windows XP. When trying to configure it to connect to the internet in a bridged configuration, I get an error message when trying to bring up the network interface: [root@VMLinux ~]# /et/init.d/network start Bringing up loopback interface: [ OK ] Bringing up interface eth0: Determining IP information for eth0... failed [FAILED] VM is running on a machine that has access to the network, I tried it on two different networks that have DHCP enabled. Everything works fine when using a NAT connection through my host. How can I make the bridge work for me? Thanks.

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• SSH not working over IPSec tunnel (Strongswan)

  - by PattPatel

  I configured a small network on a cloud virtual machine. This virtual machine has a static IP address assigned to eth0 interface that I'll call $EXTIP. mydomain.com points to $EXTIP. Inside, I have some linux containers, that get their ip through DHCP in the Subnet 10.0.0.0/24 (i called the virtual interface nat ). They run some services that can be reached through DNAT. Then I wanted to connect to these containers through an IPSec tunnel, so I configured StrongSwan. ipsec.conf: conn %default dpdaction=none rekey=no conn remote keyexchange=ikev2 ike=######## left=[$EXTIP] leftsubnet=10.0.1.0/24,10.0.0.0/24 leftauth=pubkey lefthostaccess=yes leftcert=########.pem leftfirewall=yes leftid="#########" right=%any rightsourceip=10.0.1.0/24 rightauth=######## rightid=%any rightsendcert=never eap_identity=%any auto=add type=tunnel Everything works fine, IPSec clients get IPs of the 10.0.1.0/24 subnet and can reach the containers subnet. My problem is that I'm not able to get SSH connections over the tunnel. It simply does not work, ssh client does not produce any output. Sniffing with tcpdump gives: tcpdump: 09:50:29.648206 ARP, Request who-has 10.0.0.1 tell mydomain.com, length 28 09:50:29.648246 ARP, Reply 10.0.0.1 is-at 00:ff:aa:00:00:01 (oui Unknown), length 28 09:50:29.648253 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [S], seq 4007849772, win 29200, options [mss 1460,sackOK,TS val 1151153 ecr 0,nop,wscale 7], length 0 09:50:29.648296 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [S.], seq 2809522632, ack 4007849773, win 14480, options [mss 1460,sackOK,TS val 11482992 ecr 1151153,nop,wscale 6], length 0 09:50:29.677225 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 2809522633, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 0 09:50:29.679370 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 0:23, ack 1, win 229, options [nop,nop,TS val 1151162 ecr 11482992], length 23 09:50:29.679403 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483002 ecr 1151162], length 0 09:50:29.684337 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1:32, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 31 09:50:29.685471 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1448 09:50:29.685519 IP mydomain.com > 10.0.0.1: ICMP mydomain.com unreachable - need to frag (mtu 1422), length 556 09:50:29.685567 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 32:1402, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 1370 09:50:29.685572 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], seq 1402:1480, ack 24, win 227, options [nop,nop,TS val 11483003 ecr 1151162], length 78 09:50:29.714601 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 32, win 229, options [nop,nop,TS val 1151173 ecr 11483003], length 0 09:50:29.714642 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483012 ecr 1151173], length 120 09:50:29.723649 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [P.], seq 1393:1959, ack 32, win 229, options [nop,nop,TS val 1151174 ecr 11483003], length 566 09:50:29.723677 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [.], ack 24, win 227, options [nop,nop,TS val 11483015 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 0 09:50:29.725688 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1480, win 251, options [nop,nop,TS val 1151177 ecr 11483003], length 0 09:50:29.952394 IP 10.0.0.1.ssh > 10.0.1.2.54869: Flags [P.], seq 1480:1600, ack 24, win 227, options [nop,nop,TS val 11483084 ecr 1151173,nop,nop,sack 1 {1394:1960}], length 120 09:50:29.981056 IP mydomain.com.54869 > 10.0.0.1.ssh: Flags [.], ack 1600, win 251, options [nop,nop,TS val 1151253 ecr 11483084,nop,nop,sack 1 {1480:1600}], length 0 If you need it this is my iptables configuration file: iptables: *filter :INPUT ACCEPT [144:9669] :FORWARD DROP [0:0] :OUTPUT ACCEPT [97:15649] :interfacce-trusted - [0:0] :porte-trusted - [0:0] -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FORWARD -j interfacce-trusted -A FORWARD -j porte-trusted -A FORWARD -j REJECT --reject-with icmp-host-unreachable -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A FORWARD -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT -A interfacce-trusted -i nat -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 80 -j ACCEPT -A porte-trusted -d 10.0.0.1/32 -p tcp -m tcp --dport 443 -j ACCEPT -A porte-trusted -d 10.0.0.3/32 -p tcp -m tcp --dport 1234 -j ACCEPT COMMIT *nat :PREROUTING ACCEPT [10:600] :INPUT ACCEPT [10:600] :OUTPUT ACCEPT [4:268] :POSTROUTING ACCEPT [18:1108] -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.0.0.1:80 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 443 -j DNAT --to-destination 10.0.0.1:443 -A PREROUTING -d [$EXTIP] -p tcp -m tcp --dport 8069 -j DNAT --to-destination 10.0.0.3:1234 -A POSTROUTING -s 10.0.0.0/24 -o eth0 -m policy --dir out --pol ipsec -j ACCEPT -A POSTROUTING -s 10.0.1.0/24 -o nat -j MASQUERADE -A POSTROUTING -s 10.0.0.0/24 -o eth0 -j MASQUERADE COMMIT Probably I'm missing something stupid... Thanks in advance for helping :))

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• OpenSolaris with no gcc vs. Nexenta with no ext3

  - by Jake Wharton

  I'm attempting to migrate my server from linux to a Solaris variant during a hardware upgrade. The machine is based around an Abit AN-M2 board which has an NForce chipset. I have what seems to be a chicken-and-egg problem of sorts: OpenSolaris 2009.06 does not recognize the NIC and I cannot compile the drivers for it as it also lacks gcc. I haven't tested as to whether or not I can mount an ext3 partition yet but its moot if there is no networking. Nexenta 3.0b3 recognizes the NIC but I cannot get the ext3 drives mounted due to FSWfspart refusing to install. I do not know much about Solaris but I wager this is due to the fact that Nexenta is based around Debian as well. While I am reusing the mobo/CPU combo, I did just spent a lot of money on the other hardware around it and would very much like to get it up and running smoothly and quickly. Does anyone have any suggestions that are not: Get a new mobo/CPU Run another OS Use alternate NIC

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• How to change 802.1x settings for Wireless in Windows XP SP3?

  - by mspoerr

  Hello, I want to configure EAP-TLS with Machine Authentication ONLY for a wireless network. The supplicant is the bulit-in supplicant in Windows XP SP3. I found the following document: http://support.microsoft.com/kb/929847 - How to enable computer-only authentication for a 802.1X-based network in Windows Vista, in Windows Server 2008, and in Windows XP Service Pack 3 But unforunately the needed command "netsh wlan" is not available in Windows XP - "Note Windows XP SP3 and earlier versions of Windows XP do not support the netsh wlan command." How can I change the settings without the "netsh wlan" command? Thanks, mspoerr

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• Simulating an UNC path with a leading dot

  - by Uwe Keim

  Being a C# .NET Windows Forms developer, some customers are running our applications on an Apple OS X Mac inside a Parallels virtual machine. Parallels presents host folders to the guest Windows as UNC paths with a leading dot like \\.psf\Home\Some\More\Folders Now an application of us cannot handle the leading dot correctly when accessing files from these kind of shares ("Invalid URI, cannot analyze host name" exception). I want to debug and fix this issue, unfortunately I do have no Mac and Parallels around here to test it. My question is: Is there a way to "simulate" this kind of share on a normal Windows server or client so that I'll be able to debug my application with Visual Studio? What I tried so far: I already tried to edit my HOSTS file to contain an entry like # ... 127.0.0.1 .psf # ... but Windows just seems to not recognize the share at all.

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• Thomson TG585v7 router - promiscuous mode

  - by Nikita

  I have a TG585v7 as a router with several machines plugged into it. In the default setup, the packets are only delivered to the specific machine but I want to be able to setup to monitor all network traffic on one of the machines, i.e. I need those packets to be picked up when my ethernet card is in promiscuous mode. Is this possible? Guide here has this "mcastpromisc Make the IP interface multicast promiscuous. OPTIONAL", is this what I am looking for? Does it mean I need to manually add all my machines by their MAC addresses to be able to receive packets destined for them? Or am I out of luck and I need to get a better router?

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• Recommended CPU upgrade for Dell Vostro 220 with Intel E7300 processor?

  - by Justin Grant

  I've got a Dell Vostro 220 with an E7300 processor (Intel Core 2 Duo @ 2.66Mhz, LGA775 socket) and I'm thinking about upgrading my processor so I can run Windows Server 2008 R2 with Hyper-V, which requires Hardware Virtualization support in the processor. Yes, I know this is underpowered for a server, I'm actually using it as a desktop machine but I'd like to use Hyper-V instead of Virtual Server (which I'm using now for running VMs). I'd like to keep the same motherboard and ideally the same CPU fan and RAM too. Any suggestions for a good, relatively cheap (under $200) processor upgrade?

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• Getting .deb package dependencies for an offline Ubuntu computer through Windows

  - by user109500

  Basically I want to "batch" download a .deb file and all its dependencies at once on a Windows 7 machine (of which I do not have admin access, it is a public computer.) I've seen plenty of Ubuntu based fixes that require terminal and apt, I'm asking how to do this on Windows. (I am not sure if this question fits here but I haven't found anywhere else that it could go.) I've tried Keryx and Sushi-huh to try to get packages and their dependencies but these both require Python, Python can't be normally installed without admin permission. (Side note, I think I've seen programs bundle python so they can work without installing it to c:, is this possible as a workaround? Google isn't helping) If anyone wants to know I'm trying to download Krita and Blender for Ubuntu 12.10/AMD64 I have been able to manually download single .deb files and dependencies upwards to 38 dependent packages, but then those 38 packages depend on other packages, It's maddening to not have some way to automatically do this on Windows. *Edit Sorry I forgot to make it clear that my personal home computer is running Ubuntu 12.10 and the public computer I'm using to download is Windows 7

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• How can I setup my local Nginx server so I can edit the files?

  - by Shane Grant

  I have my local development machine running Arch Linux, Nginx, PHP-FPM and MySQL. In order for the websites I am working on to run the files need to be owned by the http user. The files are currently located in folders like this: /srv/http/site1/ /srv/http/site2/ When I use the following chown command on the http folder the sites work fine, but I cannot edit the files with my user: chown -R http.users /srv/http When I do this the sites do not work, but I can edit the files: chown -R shane.http /srv/http How can I make it so that my user can edit the files, and the web server can run them at the same time? Thank you

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• Woman Is the World's First Computer Programmer? [closed]

  - by Sveta Bondarenko

  This week, on 10th December, we celebrate the 197th birth anniversary of Ada Lovelace, often considered as the world's first computer programmer. Ada became famous not only as a daughter of romantic poet Lord Byron but also as an outstanding 19th century mathematician. Her works on analytical engine are recognized as the first algorithm intended to be processed by a machine. Women always played a crucial role in the computer science evolution, but unfortunately, they are considered to be not so good at programming and engineering as men. Even though the fair sex makes up a growing portion of computer and Internet users, there is still a large gender gap in the field of Computer Science. But all is not lost! According to the study women's enrollment in the computer science raised from 7 percent in 1995 to 42 percent in 2000. And it is still increasing. Soon women will take a well-deserved position among the world's top computer programmers. After all, a number of notable female computer pioneers such as Ada Lovelace, Grace Hopper, and Anita Borg have proven that women make great computer scientists. But will women make great contributions to the modern technologies industry? Or successful and famous female computer programmer is just a pipe dream?

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• How to block own rpcap traffic where tshark is running?

  - by Pankaj Goyal

  Platform :- Fedora 13 32-bit machine RemoteMachine$ ./rpcapd -n ClientMachine$ tshark -w "filename" -i "any interface name" As soon as capture starts without any capture filter, thousands of packets get captured. Rpcapd binds to 2002 port by default and while establishing the connection it sends a randomly chosen port number to the client for further communication. Both client and server machines exchange tcp packets through randomly chosen ports. So, I cannot even specify the capture filter to block this rpcap related tcp traffic. Wireshark & tshark for Windows have an option "Do not capture own Rpcap Traffic" in Remote Settings in Edit Interface Dialog box. But there is no such option in tshark for linux. It will be also better if anyone can tell me how wireshark blocks rpcap traffic....

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• installing ubuntu on SSD

  - by kunal

  Going to install Ubuntu 10.10 on new intel x25M 80GB SSD. It will be fresh install. I have been googling for past few days and getting overwhelming articles/blogs/Q&As. One particularly very useful being: Optimize for SSD (I could not post other links as i dont have enough credits) But with so many suggestions and differences of opinions (on different links) this simple OS install process seems to be daunting task to me and I really want to stick with ubuntu (although have used for very short period of time). Can someone help me by answering few questions (yes they are repeated as i couldnt comprehend the answers elsewhere) which file system (ext2/3/4 or something else)? (consider SSD life) can it be changed after installation? should i partition the disk? (as we do in traditional HDD) for now, no plan of dual booting. Only ubuntu will live on scarce space of 80GB SSD. i have 2 GB RAM, should i still allocate swap space (if i dont allocate swap space, can i still hibernate the machine)? will swap space impact SSD life? should i consider putting additional 1GB RAM to avoid swap space? Linux experience - absolute novice intended usage - heavy browsing, programming, regular video/music and some other non-CPU/RAM-intensive programs. will backup big files to an external hard drive. laptop config - 3 yr old vaio, core2 duo, 2GB RAM Please pardon the repetition and i really appreciate anyone helping me getting started with ubuntu.

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• Web Sites All Start When Debugging a Web Site - Visual Studio 2010

  - by Daniel Lackey

  I wanted to blog about this because it was an annoyance to me and I couldn't figure out why for quite some time. Have you ever tried debugging one web application in your solution but when you do, all other web sites in your solution build and then start up their respective Visual Studio Development Server? It's not a major problem, but it adds time to waiting for what you are actually trying to debug to start up. After digging through Visual Studio 2010 settings, I finally found the option to turn it off. It is called Always Start When Debugging and is located in the Properties pane for the web project (click on the project .proj file in Visual Studio IDE). This is set to True by default each time you create a new Web Application project. Setting this to false will solve your problems. You will need to set this to false for all web applications in your solution as shown below: In addition, you can set properties on which port the development server uses each time it debugs. This is helpful if you want the port to stay the same for testing purposes. In contrast, you can set it to use a dynamic port each time so if you have a co-worker that is debugging it on a different session on the same server, you won't run into any problems with using the same port. The machine won't allow you to debug two sessions on the same port. Pretty basic stuff but it seemed like a really quirky setting to me.

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• Bad DMA/do_IRQ errors on suspend/resume, with occasional freezing

  - by Steve Kroon

  Every time I suspend or resume my laptop (Dell Latitude E6520, bought this year), I get 2 messages of the form displayed on the console just before shutting down/starting up: [ 407.107610] ehci_hcd 0000:00:1d.0: dma_pool_free buffer-128, f6f18000/36f18000 (bad dma) On occasion, I get a message of the form: [ 3753.979066] do_IRQ: 0.177 No irq handler for vector (irq -1) On occasion, my machine freezes with a flashing Caps Lock button when suspending, after which I need to do a hard shutdown. This never happened before the messages started appearing (a while back), and I think it never happens without a do_IRQ message appearing (although I'm not sure about that). [There's nothing in the owner's manual on a flashing Caps Lock button; apparently it may be a kernel panic if the scroll lock also flashes, but the laptop doesn't have a scroll lock light, and there's no message on the console saying kernel panic.] Are these bad DMA/do IRQ messages serious, and what can I do to investigate/troubleshoot them and the freezing? Edit: I've also now received the following error messages a few times: [246943.023908] JBD: I/O error detected when updating journal superblock for sdb1. [246943.023958] Buffer I/O error on device sdb1, logical block 0 [246943.023996] EXT3-fs (sdb1): I/O error while writing superblock Edit: Output of dmesg at http://pastebin.com/ra7MTQEj ; contents of /var/log/kern.log at http://pastebin.com/i6jf0Md9 Edit: the output of some smartctl (-a, -x, --log=error, --log=xerror) instructions is available at http://paste.ubuntu.com/1088488/ . Edit (31/8/2012): Output of dmesg|grep -i ehci available at http://paste.ubuntu.com/1177246/ .

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• How to stop blanking screen although I am active on Ubuntu Karmic on old IBM Laptop

  - by Glen S. Dalton

  How to stop blanking screen although I am active on Ubuntu Karmic on old IBM Laptop 600E? After some time of working on the machine the screen goes blank. When I hit ESC on the built-in keyboard (not on the attached USB keyboard where I work) it comes back and everything works fine until the next screen-blanking. I suspect it is some power management issue. When I use an old keyboard that has a ps2 connector it does not happen. So my guess is that the usb keyboard does not update the power management timer that detects when the session was last used? I am using fluxbox window manager. I do not want to disable power management because it is nice that the fan only works at the necessary speed (the fan spped is regulated which I can hear) But I could disable power management for testing purposes.

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• Moving from Silverlight 4 Beta to RC - Part 2

  In my previous post I talked about updating my development environment from Silverlight 4 Beta to Silverlight 4 RC (release candidate). After updating, I opened the solution for my Task-It project and found that several things were broken. I would've been surprised if it just worked as is! What disappointed me is that after spending a decent amount of time searching the web, I could not find information telling me what I needed to update/change...and wouldn't it be nice if there was a wizard to update it for you? What changed? I wish I had made notes along the line of each of the things I found, but here are a few that I can recall: In the Web project, the following dll's no longer exist: System.Web.DomainServices.dll System.Web.DomainServices.LinqToSql.dll (if you are using the Entity Framework I believe that one is System.Web.DomainServices.EntityFramework.dll) System.Web.Ria.dll In the Silverlight project: System.Windows.Ria.dll I'm not positive which new assemblies need to be referenced for your project, but I'm going to list the ones I think you need. One way to verify is to create a new Silverlight application with support for WCF RIA Services and see which dlls are included. In the Web project: System.Data.Entity.dll System.ServiceModel.DomainServices.EntityFramework.dll (I've moved from LinqToSql to EntityFramework, so I'm not sure which one the LinqToSql stuff comes from) System.ServiceModel.DomainServices.Hosting.dll System.ServiceModel.DomainServices.Server.dll In the Silverlight project: System.ServiceModel.DomainServices.Client.dll System.ServiceModel.DomainServices.Client.Web.dll System.ServiceModel.Web.Extensions.dll Where are these dll's? These all live in either the Silverlight or RIA Services subdirectories under:         C:\Program Files\Microsoft SDKs Of if you are on a 64-bit machine like me:         C:\Program Files (x86)\Microsoft SDKs Wrap up Good luck, and I hope this helps to get you back in business! If anyone finds anything that I've missed, please enter a comment and I'll update the post accordingly.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Configure IIS 7 Reverse Proxy to connect to TeamCity Tomcat

  - by Cynicszm

  We have an IIS 7 webserver configured and would like to create a reverse proxy for a TeamCity installation using Tomcat on the same machine. The IIS server site is https://somesite and I would like the TeamCity to appear as https://somesite/teamcity redirecting to http://localhost:portnumber I have installed the IIS URL Rewrite extension from http://www.iis.net/download/URLRewrite and the Application Request Routing from http://www.iis.net/download/ApplicationRequestRouting to try and setup a reverse proxy but can't get it working. The closest answer I found is an old StackOverflow question http://stackoverflow.com/questions/331755/how-do-i-setup-teamcity-for-public-access-over-https which unfortunately doesn't have a working example. I've searched a quite a bit but can't seem to find a relevant example. Any help appreciated (apologies for the bold but the spam prevention won't let me post more than 1 hyperlink)

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• juju -v status ERROR Invalid SSH key

  - by Captain T

  root@cloudcontrol:/storage# juju -v status 2012-06-07 11:19:47,602 DEBUG Initializing juju status runtime 2012-06-07 11:19:47,621 INFO Connecting to environment... 2012-06-07 11:19:47,905 DEBUG Connecting to environment using node-386077143930... 2012-06-07 11:19:47,906 DEBUG Spawning SSH process with remote_user="ubuntu" remote_host="node-386077143930" remote_port="2181" local_port="57004". The authenticity of host 'node-386077143930 (10.5.5.113)' can't be established. ECDSA key fingerprint is 31:94:89:62:69:83:24:23:5f:02:70:53:93:54:b1:c5. Are you sure you want to continue connecting (yes/no)? yes 2012-06-07 11:19:52,102 ERROR Invalid SSH key 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@658: Client environment:zookeeper.version=zookeeper C client 3.3.5 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@662: Client environment:host.name=cloudcontrol 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@669: Client environment:os.name=Linux 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@670: Client environment:os.arch=3.2.0-23-generic 2012-06-07 11:19:52,426:18541(0x7feb13b58700):ZOO_INFO@log_env@671: Client environment:os.version=#36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@679: Client environment:user.name=sysadmin 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@687: Client environment:user.home=/root 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@log_env@699: Client environment:user.dir=/storage 2012-06-07 11:19:52,428:18541(0x7feb13b58700):ZOO_INFO@zookeeper_init@727: Initiating client connection, host=localhost:57004 sessionTimeout=10000 watcher=0x7feb11afc6b0 sessionId=0 sessionPasswd= context=0x2dc7d20 flags=0 2012-06-07 11:19:52,429:18541(0x7feb0e856700):ZOO_ERROR@handle_socket_error_msg@1579: Socket [127.0.0.1:57004] zk retcode=-4, errno=111(Connection refused): server refused to accept the client 2012-06-07 11:19:55,765:18541(0x7feb0e856700):ZOO_ERROR@handle_socket_error_msg@1579: Socket [127.0.0.1:57004] zk retcode=-4, errno=111(Connection refused): server refused to accept the client This is from a clean install with 2 nodes all running 12.04 Precise juju bootstrap - finishes with no errors and allocates the machine to the user but still no joy after juju environment-destroy and rebuild with different users and different nodes. Anyone got any ideas

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• Remote Desktop Services Gateway Issue

  - by AVandelay05

  Alright fellow techies here's the rundown. I have installed Server 2008 r2 Remote Dekstop Services on a VM in my network. I installed the following RD role services: RD Session Host, Licensing, Connection Broker, Gateway, Web Access. When I set things up originally, the gateway server and RDWeb worked as it should locally. After getting things running locally (remoteserver.domainname.local) I wanted to test things externally. From the outside, I couldn't get things running (meaning I could connect to rdweb access externally, but when I tried to run an app I would get the message "can't connect/find computer"). Here's my setup for external access The VM has every RD Services role services installed on it, meaning it acts as gateway, rd web access, session host, licensing, the whole bit. I made a self-signed certificate on the gateway server (gateway.domainname.net is the cert name). Internally, I have a secondary forward-lookup zone called domainname.net with an A record gateway pointing to the local IP of the gateway server. On our public DNS (domainname.net) I have an A record gateway. This is to access the RDWeb externally. In IIS I have the following authentication settings RDWeb: All disabled except for anonymous authentication Rpc: All disabled except for basic and windows RpcWithCert: All disbled except for windows authentication I have the necessary web access config in our sonicwall tz210 (https and rdp, external ip pointing to local ip of rds server) RAP and CAP have the correct user and computer groups, authentication, and allowed devices After all of this, here's what happens accessing externally. I can login correctly to RDWeb Access (I've tried a bogus login, I can't login to it so that's working properly). I see the Apps for use. I click on an app, click connect, the credential window opens, I put in the correct user creds, it tries to connect to the gateway server, but then the cred window comes back in view. I tried to reach a limit of failed logins, but never reached one, haha. So from the same external client machine I try to connect to the gateway through a Remote Desktop connection. I put in the correct gateway settings in the RD window, try to connect and get the same results as I did in RDWeb access. I checked the event logs on the RD Services machine and saw the following event IDs around the time I tried to login externally: ID 6037 with the message "The program svchost.exe, with the assigned process ID 2168, could not authenticate locally by using the target name host/gateway.domainname.net. The target name used is not valid. A target name should refer to one of the local computer names, for example, the DNS host name. Try a different target name." ID 10 RADWebAccess "RD Web Access was unable to access gateway.domainname.net, which is the server that is specified as running the RemoteApp and Desktop Connection Management service. Ensure that the computer account of the RD Web Access server is a member of the TS Web Access Computers security group on gateway.domainname.net" ID 4625 "An account failed to log on. Subject: Security ID: NULL SID Account Name: - Account Domain: - Logon ID: 0x0 Logon Type: 3 Account For Which Logon Failed: Security ID: NULL SID Account Name: Administrator Account Domain: gateway.domainname.net Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Sub Status: 0xc000006a Process Information: Caller Process ID: 0x0 Caller Process Name: - Network Information: Workstation Name: USER-LAPTOP Source Network Address: External IP Source Port: 63125 Detailed Authentication Information: Logon Process: NtLmSsp Authentication Package: NTLM Transited Services: - Package Name (NTLM only): - Key Length: 0 This event is generated when a logon request fails. It is generated on the computer where access was attempted. The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe. The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network). The Process Information fields indicate which account and process on the system requested the logon. The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases. The authentication information fields provide detailed information about this specific logon request. - Transited services indicate which intermediate services have participated in this logon request. - Package name indicates which sub-protocol was used among the NTLM protocols." I don't think the VM has a null SID. The SID of the VM and it's physical host have different SIDS. I can access the blank page for rpc externally using the external gateway name. It seems like authentication is a problem. Also, is it a problem that the external name of the gateway server doesn't match the local name? The external name (which the cert is based on) is gateway.domainname.net and the internal name is remoteserver.domainname.local. That's the only thing I can think of that would be the problem, but the external name has to be different from the local right? Internally, I ping gateway.domainname.net and it gives me the correct local IP of the server. Now, there isn't an actual computer name in AD, but I don't know how I would achieve that? I hope I've been clear....any help would be appreciated. I think I'm close to achieving this. :)

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• xauth error with ssh X Forwarding

  - by bdk

  From my (Debain) Desktop machine, I am trying to ssh into a Debian Server with ssh -X remote-ip After logging into the remote host, I get: /usr/bin/X11/xauth: creating new authority file /root/.Xauthority /usr/bin/X11/xauth: (stdin):1: bad display name "unix:10.0" in "remove" command /usr/bin/X11/xauth: (stdin):2: bad display name "unix:10.0" in "add" command And the X Forwarding doesn't work. From my Desktop I can ssh -X into other Debian servers and it works fine. I found a lot of threads discussing similar issues on google, but they all seem to fade out without a solution, and the simple things suggested there like exporting DISPLAY or setting xhost + don't seem to make a difference.

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• xDebug on Zend Server CE under Windows XP

  - by Hippyjim

  I have Zend Server installed on my Windows XP development machine, installed when I was naive and didn't know that Eclipse was going to become so suck so badly for PHP development. I've made the upgrade to Netbeans, but for debugging they only support xDebug. To be fair I've never used "proper" debuggers before, but other folks have raved about them so I thought I'd give it a try. I followed some directions on the Zend forum about how to install xDebug on Zend server, disabling Zend Debugger in the process. The xDebug "custom installation instructions" wizard tells me that my PHP was compiled with an unsupported compiler (MS VC8), and won't let me download anything. I tried a couple of the other xDebug binaries, but they just refused to load. So I'm left without a debugger option. Does anyone know how I can change the compiler of the php version I have installed so I can use a debugger in Netbeans? or how else i can get xDebug to install on Zend Server?

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• probability of trouble-free upgrade

  - by intuited

  One of the problems with recommending Ubuntu to potential future users, especially those not particularly given to technical endeavours, is that there is a chance that upgrades will break their machine, and they'll have to pay or otherwise coerce some knowledgeable person into fixing them. In my limited experience of running successive versions of Ubuntu since 8-something on a couple of different laptops, this chance is quite high. I'm not sure if I'm just unlucky with the hardware that I'm using, or if it's a result of the higher-than-average number of packages I have installed, or if upgrades are just typically problematic. So I'd like to know the likelihood, for a casual user, of doing a release upgrade, for example from 10.04 to 10.10, without experiencing any regression bugs. Obviously this is dependent on the hardware that people are running. Canonical seems to be making some efforts towards collecting data on this, for example with the "I am affected by this bug" checkbox on their issue tracker, and with the laptop compatibility reports, but I've not seen anything comprehensive. I'm hoping for an objective reference here, for example a study carried out by relatively unbiased individuals. However, anecdotal evidence is probably useful too.

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• Animating DOM elements vs refreshing a single Canvas

  - by mgibsonbr

  A few years ago, when the HTML Canvas element was still kinda fresh, I wrote a small game in a rather "unusual" way: each game element had its own canvas, and frequently animated elements even had multiple canvases, one for each animation sprite. This way, the translation would be done by manipulating the DOM position of the canvases, while the sprite animation would consist of altering the visibility of the already drawn canvases. (z-indexes, of course, were the tricky part) It worked like a charm: even in IE6 with excanvas it showed a decent performance, and everything was rather consistent between browsers, including some smartphones. Now I'm thinking in writing a larger game engine in the same fashion, so I'm wondering whether it would be a good idea to do so in the current context (with all the advances in browsers and so on). I know I'm trading memory for time, so this needs to be customizable (even at runtime) for each machine the game will be running. But I believe using separate canvases would also help to avoid the game "freezing" on CPU spikes, since the translation would still happen even if the redraws lag for a while. Besides, the browsers' rendering engines are already optimized in may ways, so I'm guessing this scheme would also reduce the load on the CPU (in contrast to doing everything in JavaScript - specially the less optimized ones). It looks good in my head, but I'd like to hear the opinion of more experienced people before proceeding further. Is there any known drawback of doing this? I'm particulartly unexperienced in dealing with the GPU, so I wonder whether this "trick" would nullify any benefit of using a single, big canvas. Or maybe on modern devices it's overkill (though I'm skeptic about the claims that canvas+js - especially WebGL - will ever be a good alternative to native code). Any thoughts?

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• Sound stopped working

  - by Brian West

  I ran through the troubleshooting at https://help.ubuntu.com/community/SoundTroubleshooting It did not play the test sound, and it also does not play sounds during speaker-test. It does play sounds when I adjust my volume on my computer (using pommed). It worked just the other day, but this is the first time I've tested it since last night, when I put it to pm-suspend-hybrid and it half-woke up (the backlight came on, but it didn't fully wake up), then went back, then half-woke again, but was frozen like that. I had to do a manual reboot of the machine when that happened. Now my sound doesn't work, except for adjusting the volume (where the little "beep" sound plays). During the troubleshooting, it recognized my sound card, the sound modules, and the sound card's installation. I've tried removing ~/.pulse, but to no avail. Also, if it's any help, pulseaudio is running, but pulseaudio --check returns nothing, which the manpage suggests indicates an error. Edit: I should probably clarify that the wake up from the suspend-hybrid was not provoked in any way. I was laying in bed when I noticed my room was brighter suddenly, so I got up to check on it.

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