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• What differences are there between an official Ubuntu AMI image and a base install from an ISO?

  - by David Winter

  When creating a new instance on AWS using an official Ubuntu 12.04 server AMI, what differences are there compared to if I was to do a standard server install on a computer of my own? For example, the default user is 'ubuntu'. An SSH public key is added to that users authorized_keys file. Sudo is passwordless for that user. PasswordAuthentication is disabled for SSH. etc etc. Configurations have been changed from their defaults, and I'd like to know if there is a list, or somewhere I could find out the modifications made.

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• A button to set all processes to on-hold for Linux?

  - by fuenfundachtzig

  When Linux starts swapping you're basically doomed. Very soon the system won't react to any input any more, but happily swap on until the end of days... Can you think of a command that holds all processes whatsoever, thus (and while) allowing you to open a clean shell where you can examine the source of the problem and kill the process which ate up all the memory? (I guess this won't be easy, because as the memory is probably completely filled up you'd need to swap out some more memory to gather space for opening a shell, on the other hand all other swapping processes must be stopped.) If you tied such a command to a hot key then maybe you can use this as an emergency button saving you a lot a time. Any ideas if this is possible at all? Has somebody tried something like this before? If one could realize this it would be a cool feature :)

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• What causes memcache to delete keys?

  - by Arkaaito

  Our memcache install recently started removing keys, and we're not sure why. Large groups of keys vanish at the same time. Memcache reports that evictions are low to non-existent, and our app has no way to clear memcache (it can only delete specific keys). Even keys of which the app has no knowledge get deleted, so we're pretty convinced they're getting expired. However, our memcache configuration hasn't been touched in some time. Has anyone debugged an issue like this before, and if so, are there any steps you'd recommend we take? How flexible is memcache's expiration policy - is it possible that we're suddenly running into a criterion based on (say) write frequency to a key?

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• What does advantages of WIM image that file based vs. ISO or another sector based images in Administrator

  - by saber tabatabaee yazdi

  answers of this question is very important to administrators to choose between Microsoft solution or other 3rd Party Tools. WIM solution is file based and others are sector by sector images like Acronis or other backup and clone tools like Norton Ghost or Cloning in vmware ESXi and etc. My question about the advantages of WIM to edit or deploy in Enterprise? to get agreements of managers to choose between these alternative decisions. Are we had any Key Performance Indicators in Change management? Are there any statistics about compares of these solutions? What Time is spend in any solotion to get image or change images or revert and apply images? Is it possible to change and modify images that made in All of these solutions as easy as in WIM file?

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• Force startx to run X in a specific resolution and refresh Rate

  - by Z9iT

  From my past experience (using Win-Xp), this particular monitor works only on 60Hz , Best resolution being 1024x768. I have "installed and configured" Ubuntu 12.04 Minimal (on USB stick) so that most of the time terminal is used, however, whenever there is a need to enter GUI, I may issue startx command to go into gnome. However the problem is that on this particular system, issuing this command poses problem because its default refresh rate won't synchronize with the monitor. The display keep on flickering and utterly unreadable. It is visible that gnome has been loaded and default wallpaper and desktop items are visible. But the problem is due to refresh rate different than 60Hz. I am looking for a command attribute to startx command which will force the refresh rate to 60Hz and resolution preferably to 1204x768 I can open terminals with Ctrl+Alt+T and enter commands. Key combinations like Ctrl+Alt+NumPlus works flawlessly in distributions like solaris, but it's not working for me. Also the commands like xrandr -r 60 60 being refresh rate wont work. The same problem is faced even when I boot from a live CD

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• Oracle Database 12c Technical Trainin

  - by mseika

  Audience Database Administrators, Solutions Architects, System Engineers, Technical Consultants, Implementation and support personnel, Technical Analysts, and Developers. What We Are Announcing During his opening keynote at Oracle OpenWorld 2012, Larry Ellison previewed Oracle Database 12c - the latest generation of the database market leader and Oracle flagship product. Oracle Database 12c introduces many groundbreaking features making it the database foundation of choice for the cloud. Many years of development effort have been focused on introducing innumerable new technological innovations centered on the cloud computing platform. This training session will focus on the specific needs of our Oracle partner community and developers, and provide insight into the many features and capabilities your customers will be looking to leverage in their own environments. Topics includes: Consolidation and Cloud Strategies Deep dive into the key Database 12c Options Migrating to Oracle Database 12c Webcast Details Speaker: Sean Stacey, Director of Platform Technology Solutions.Please note that you will need to join both the Audio and Web Conferences to attend. Please plan on joining 10 minutes before the scheduled time. Region: Date & Time Audio Conference Web Conference Calendar NAS, LAD, EMEA July 28am PT (US) Duration: 1 hour US/Canada: (866) 900-7470Click for local numberIf your country is not listed, dial +1 (706) 634-7953. Local charges may applyCONFERENCE ID: 98498078 Click here to joinPassword: Oracle123 Add this session to your calendar If you have any questions, please contact: Yvonne OungSenior Manager, Channel [email protected]

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• Adventures in Lab Management Configuration: Part 3 of 3

  - by Enrique Lima

  This is long overdue.  But here it is. In the previous two sections I have discussed on how I got a CMMI v4.2 to take on the same fields as v5 and therefore be able to communicate with MTM and Lab Manager.  And that was quite a success. Yet when I opened up Lab Management while it was fully aware of the VMs being there, it refused to let me enroll them into an environment.  It kept stating there was no suitable host to deploy the VM to, error TF259115. This was an indication something was not matching the expected network configuration between TFS and Hyper-V/SCVMM. So, here are a couple of things that took place: Verified the network segment specified for network isolation matched what was configured physically for either DHCP or manually assigned IP addressing for the guest VMs Made sure TFS was fully aware of the configuration settings for the network location name.  For that I issued:  tfsconfig lab /settings /networklocation:”<name of the network location configured in SCVMM” On that last item, that was key to making sure Lab Management communicated with the VMs and for it to allow enrollment into the new Virtual Environment.

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• SOA Composite Sensors : Good Practice

  - by angelo.santagata

  I was discussing a interesting design problem with a colleague of mine Niall (his blog) on the topic of how to cancel an inflight SOA Composite process.  Obviously one way to do this is to cancel the process from enterprise Manager ( http://hostort/em ) , however we were thinking this isnt a “user friendly” way of doing this.. If you look at Nialls blog you’ll see he’s highlighted a number of different APIs which enable you the ability to manipulate the SCA instance, e.g. Code Snippet to purge (delete) an instance How to determine the instanceId from a composite_sensor_value using the “composite_sensor_value” table How to determine a BPEL Process status using the cube_instance table   Now all of these require that you know the instanceId of your SOA Composite, how does one find this out? Well the easiest way of doing this is to create a composite sensor on the SCA component. A composite sensor is simply a way of publishing a piece of business data as part of your composite. The magic here is that you can later query composites based on this value. So a good best practice is that for any composites you create consider publishing a composite sensor value using a primary key of some sort , e.g. orderId, that way if you need to manipulate/query composites you can easily look up the instanceId using the sensorid.   For information on how to create a composite Sensor id see this documentation link  

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• Selectively delete entries from Windows 7 autocomplete history dropdown box

  - by kez

  Random question, and I'm sure it has a very simple answer, if not already asked and answered in some shape or form. How do you selectively delete entries from the autocomplete history dropdown thingy? For example, in the Run dialog box, typing a few letters will display a dropdown box with a history of matchine entries that you have previously run. I swear I used to be able to delete from the list by using the arrow keys to highlight and then press the DEL key. Regardless of whether this is true or not, is there any way to selectively delete entries from this list? Another example is the dropdown list in the Remote Desktop Connection dialog box.

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• Trouble with SAT style vector projection in C#/XNA

  - by ssb

  Simply put I'm having a hard time working out how to work with XNA's Vector2 types while maintaining spatial considerations. I'm working with separating axis theorem and trying to project vectors onto an arbitrary axis to check if those projections overlap, but the severe lack of XNA-specific help online combined with pseudo code everywhere that omits key parts of the algorithm, googling has left me little help. I'm aware of HOW to project a vector, but the way that I know of doing it involves the two vectors starting from the same point. Particularly here: http://www.metanetsoftware.com/technique/tutorialA.html So let's say I have a simple rectangle, and I store each of its corners in a list of Vector2s. How would I go about projecting that onto an arbitrary axis? The crux of my problem is that taking the dot product of say, a vector2 of (1, 0) and a vector2 of (50, 50) won't get me the dot product I'm looking for.. or will it? Because that (50, 50) won't be the vector of the polygon's vertex but from whatever XNA calculates. It's getting the calculation from the right starting point that's throwing me off. I'm sorry if this is unclear, but my brain is fried from trying to think about this. I need a better understanding of how XNA calculates Vector2s as actual vectors and not just as random points.

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• How to troubleshoot problems sharing internet connection via WiFi on Mac OS X

  - by sprugman

  I'm at a hotel, plugged into their network via ethernet on my MacBook. I want to share the connection via wifi to two other computers. I went to Prefs Sharing and set up internet sharing. I know it's working because my friend with a Mac access the net fine. My friend with the PC can see the network, but can't connect to it. In the sharing prefs, airport options, I chose these options: Channel: Automatic Enable encryption: yes WEP Key length 40-bit password length: 5 chars (as specified in the instructional text) Update: I tried it with encryption turned off, and it works. Of course, I'd rather not do that... Any ideas?

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• Howto run jupiter script as superuser in lubuntu-rc.xml?

  - by KamilKrzes

  I'm trying to bind to my asus eee hotkeys couple of jupiter functions to work as on Windows. The problem is that I have to run those as superuser. Under terminal scripts are working fine so I put in my ~/.config/openbox/lubuntu-rc.xml: <keybind key="XF86Launch6"> <action name="Execute"> <command>sudo /usr/lib/jupiter/scripts/cpu-control</command> </action> </keybind> Aaaaaand... It partially works. Some of files to change with this script was changed and other no. Some of the changed one are locked so sudo probably working. I have no idea how to debug this cause I don't know where to find log of this. I'm lil' bit ashamed but I don't know how exactly sudo works. I don't want to put my password every time to change cpu frequency or toggle touchpad so I don't want to use gksu or other sudo gui.

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• Installing Ubuntu Server 12.04 as a software RAID 1 mirror fails to boot

  - by Jeff Atwood

  I'm installing a few new Ubuntu Server 12.04 LTS servers, and they have two 512 GB SSDs. I want them to use software RAID 1 mirroring, so I was following this document religiously step by step: https://help.ubuntu.com/12.04/serverguide/advanced-installation.html To summarize the above official documentation: to set up a software RAID 1 mirror in Ubuntu Server, you choose manual partitioning during the setup, and do this on each drive: "swap" partition of roughly RAM size "physical volume for RAID" partition for remaining drive size After that, you set up the RAID 1 mirror using the RAID partitions on drive A and B, make it ext4 and containing the root filesystem partition. Setup continues from there just fine. One caveat: I was completely unable to select the "physical volume for RAID" as bootable. When I tried to do that in setup, it had no effect: I could press enter on the "make bootable" option all day long and nothing would ever change. However, after install successfully completes, I have a big problem: the system won't boot! I get Reboot and Select proper boot device or Insert Boot Media in selected Boot device and press a key What did I do wrong? Why can't I mark that "physical volume for RAID" partition bootable during Ubuntu Server setup? Is there some way for me to make the physical volumes for RAID bootable after the fact, perhaps from a live CD or something?

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• Can't figure out how to make Slitaz USB persistent

  - by Dennis Hodapp

  I installed Slitaz on my USB. However I can't figure out how to make it persistent automatically. There are different sources telling me different ways to make it persistent. One told me to add "slitaz home=usb" to the syslinux.cfg file like this: append initrd=/boot/rootfs.gz rw root=/dev/null vga=normal autologin slitaz home=usb but it didn't work for me. http://www.slitaz.org/en/doc/handbook/liveusb.html gave an example of how to do it manually but I didn't try it and I also want it to happen automatically. custompc.co.uk/features/602451/make-any-pc-your-own-with-linux-on-a-usb-key.html is an older article that also explains how to make the USB persistent but I don't want to try it cause it looks outdated (from 2008) does anyone know the best way to make the USB automatically persistent?

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• apt-get for a package with when "contrib/source/Sources" is not found correctly

  - by Stuart Woodward

  I tried to install Webmin on Ubuntu by following the instructions on http://www.webmin.com/deb.html. Using the Update Manager GUI I added the repositories and the key deb http://download.webmin.com/download/repository sarge contrib deb http://webmin.mirror.somersettechsolutions.co.uk/repository sarge contrib However when I do an: apt-get update apt-get install webmin I get the error: W: Failed to fetch http://download.webmin.com/download/repository/dists/sarge/Release Unable to find expected entry 'contrib/source/Sources' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch http://webmin.mirror.somersettechsolutions.co.uk/repository/dists/sarge/Release Unable to find expected entry 'contrib/source/Sources' in Release file (Wrong sources.list entry or malformed file) Looing at the page at the URL I can see: 7029066c27ac6f5ef18d660d5741979a 20 contrib/source/Sources.gz Is the error caused by the fact that the Sources are compressed with gzip or am I doing something wrong?

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• Oracle NoSQL Database: Cleaner Performance

  - by Charles Lamb

  In an earlier post I noted that Berkeley DB Java Edition cleaner performance had improved significantly in release 5.x. From an Oracle NoSQL Database point of view, this is important because Berkeley DB Java Edition is the core storage engine for Oracle NoSQL Database. Many contemporary NoSQL Databases utilize log based (i.e. append-only) storage systems and it is well-understood that these architectures also require a "cleaning" or "compaction" mechanism (effectively a garbage collector) to free up unused space. 10 years ago when we set out to write a new Berkeley DB storage architecture for the BDB Java Edition ("JE") we knew that the corresponding compaction mechanism would take years to perfect. "Cleaning", or GC, is a hard problem to solve and it has taken all of those years of experience, bug fixes, tuning exercises, user deployment, and user feedback to bring it to the mature point it is at today. Reports like Vinoth Chandar's where he observes a 20x improvement validate the maturity of JE's cleaner. Cleaner performance has a direct impact on predictability and throughput in Oracle NoSQL Database. A cleaner that is too aggressive will consume too many resources and negatively affect system throughput. A cleaner that is not aggressive enough will allow the disk storage to become inefficient over time. It has to Work well out of the box, and Needs to be configurable so that customers can tune it for their specific workloads and requirements. The JE Cleaner has been field tested in production for many years managing instances with hundreds of GBs to TBs of data. The maturity of the cleaner and the entire underlying JE storage system is one of the key advantages that Oracle NoSQL Database brings to the table -- we haven't had to reinvent the wheel.

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• Can you specify git-shell in .ssh/authorized_keys to restrict access to only git commands via ssh?

  - by Matt Connolly

  I'd like to be able to use a ssh key for authentication, but still restrict the commands that can be executed over the ssh tunnel. With Subversion, I've achieved this by using a .ssh/authorized_keys file like: command="/usr/local/bin/svnserve -t --tunnel-user matt -r /path/to/repository",no-port-forwarding,no-agent-forwarding,no-X11-forwarding,no-pty ssh-rsa AAAAB3NzaC1yc2EAAAABIetc... I've tried this with "/usr/bin/git-shell" in the command, but I just get the funky old fatal: What do you think I am? A shell? error message.

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• chef apt_repository fetching fails

  - by slik

  I am trying to fetch a specific repository to install a php version but I keep getting 404 NOT FOUND. chef recipe code: apt_repository "dotdeb-php54" do uri "http://archives.dotdeb.org" distribution "squeeze" components ["php5/5.4.8"] key "http://www.dotdeb.org/dotdeb.gpg" end Trying to fetch : http://archives.dotdeb.org/dists/squeeze/php5/5.4.8 But get the following error : Err http://archives.dotdeb.org squeeze/php5/5.4.8 amd64 Packages 404 Not Found Hit http://security.ubuntu.com precise-security/main Translation-en Hit http://security.ubuntu.com precise-security/multiverse Translation-en Hit http://security.ubuntu.com precise-security/restricted Translation-en Err http://archives.dotdeb.org squeeze/php5/5.4.8 i386 Packages 404 Not Found Hit http://security.ubuntu.com precise-security/universe Translation-en Ign http://archives.dotdeb.org squeeze/php5/5.4.8 Translation-en STDERR: W: Failed to fetch http://archives.dotdeb.org/dists/squeeze/php5/5.4.8/binary-amd64/Packages 404 Not Found

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• On Windows 7, how can I make the Start Menu search feature include matches from within words, not just the start of the word?

  - by Gabriel

  I have a program installed called WinSCP. When I press the Windows key and type "SCP", I get "No items match your search." Is there a configuration option I can set somewhere, so that this item will be found? I'm not looking for a specific solution for this particular program, but something general, so that if there's a program named XYZ, I can find it via the Start Menu search by entering YZ. EDIT TO ADD: I'm looking for a "set-it and forget-it" type of configuration change, so that within-word searching happens always, automatically. I don't want to have to type a * before every query. Apparently this wasn't clear from what I wrote above.

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• Intermediate SSL Certificates on Azure Websites

  - by amhed

  I have successfully configured an Extended-Validation Certificate on an Azure Website following this article: http://www.windowsazure.com/en-us/documentation/articles/web-sites-configure-ssl-certificate/ The main (non-technical) stakeholder of the web application went through great lengths to validate that our site is secure. He went to this site to check the validity of our SSL: http://www.whynopadlock.com/ The site throw the following error: `SSL verification issue (Possibly mis-matched URL or bad intermediate cert.). Details: ERROR: no certificate subject alternative name matches`` The certificate is installed using IP Based SSL instead of SNI. This is done this way because some site visitors still use Internet Explorer 8 on Windows XP, which has no support for SNI and throws a security warning. Is my certificate correclty installed? I received three .CRT files from my SSL provider: PrimaryIntermediate.crt SecondaryIntermediate.crt EndCertificate.crt This is how I exported our certificate as a .PFX file to Azure: openssl pkcs12 -export -out myserver.pfx -inkey myserver.key -in myserver.crt

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• Incident Management-Monitoring Ideas

  - by sprsr

  Hello all, What we are tring to do at our company (banking industry) is to apply some ITIL (Information Technology Infrastructure Library) principles and I need some ideas to develop our incident management system of our company. For those who have experienced with incident management, what are the things that helps you most ? What are the things that you can't live without while managing the incidents. Do you have some good screenshots of such a monitoring software ? Since we choosed to develop our own system instead of buying a big system, there are lots of things we may miss, and we are brainstorming here. I need some key points that most crucial in incident management and monitoring. Thanks.

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• Cannot type backquote or backtick in xterm

  - by Cocoro Cara

  Ubuntu 10.10, XTerm(261), Keyboard layout = Canadian Somehow, the backquote (backtick = `) character can't be input does not get entered in XTerm. I type it and nothing happens. The cursor does not move forward. I know it works because I can input it in Terminal (gnome-terminal). The only strange thing is that I have to type the key twice for it to appear. Just to test it, I tried typing it in other applications, and the same thing happens. Have to type it twice in FF, gedit, etc. One more strange thing, I could not input it into this textbox in which I am typing this message. But I can input it in the URL bar, search bar, etc. Someone please help me solve this mystery. I like to use XTerm and I need the backquotes.

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• The MDM Journey: From the Customer Perspective

  - by Mala Narasimharajan

  Master Data Management is more than just about a single version of  the truth or providing a 360 degree view of the customer.  It spans multiple domains ranging from customers to suppliers to products and beyond.  MDM is pivotal to providing a solid customer experience - one that results in repeat business, continued loyalty and last but not least - high customer satisfaction.  Customer experience is not only defined as accurate information about the customer for the enterprise, but also presenting the customer with the right information about products, orders, product availability, etc.   Let's take a look at a couple of customer use cases with Oracle MDM. Below is a picture from a recent customer panel: Oracle MDM is a key platform for increasing upsell/cross-sell opportunities, improve targeting of customers and uncover new sales opportunies, reduce inaccuracies in mailing marketing materials to prospects, as well as to tap into and uncover the full value of a customer across business units more accurately.  A leading investment and private bank leverages Oracle MDM to do a better job of identifying clients, their levels of investment as well as consistently manage them through a series of areas such as credit, risk, new accounts, etc. Ultimately, they are looking to understand client investments and touchpoints across the company's offerings.  Another use case for Oracle MDM is with a major financial and insurance services company with clients worldwide, looking to resolve customer data inaccuracies and client information stored differently across mulitiple systems.  For more information on Oracle Master Data Management, click here.  

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• Web Farm Framework - Missing IIS features

  - by Buginator

  I'm trying to install a web farm using Microsoft's Web Farm Framework 2.2. The server is Windows 2008 R2 with IIS 7.5. I followed a tutorial. Installed WFF from Web Platform Installer. However, I'm missing some key features in the "Server Farm" panel in IIS. This is how my setup looks like However, just like in the tutorial, I want it like this How can I enable ALL the things, like Load Balancer, Health Test, Server Affinity etc? Thanks. The tutorial I used was this: weblogs.asp.net/scottgu/archive/2010/09/08/introducing-the-microsoft-web-farm-framework.aspx

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• Added autossh in rc.local, but the dynamic port forwarding won't work

  - by rankjie

  I am using Rasbian on my newly arrived Rasp.Pi, and decided to make it my own proxy server. Now I need to set up a ssh tunnel on the Pi to my Linode server, and make it auto start with the system. What did I do: Add this line to /etc/rc.local autossh -f theRemoteServer -N -D 5555 -L 1234:localhost:22 After I reboot, I found out that I can't use the localhost:5555 as a socks proxy. So I type the command ps -A | grep ssh then I can see the autossh and ssh all running: pi@raspberrypi ~ $ ps -A | grep ssh 2018 ? 00:00:00 sshd 2116 ? 00:00:00 autossh 2119 ? 00:00:00 sshd 2195 ? 00:00:00 sshd 3173 ? 00:00:00 ssh (I've installed autossh, and the command works if I type it manually.) (I use the passwordless key auth, so I don't have to enter password.) Much appreciated and sorry for my poor English.

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