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• Internal Mic Ubuntu 12.04 on Compaq Presario CQ50

  - by Genius FDE

  I have problem with the internal microphone not working on Ubuntu 12.04. It looks like a common problem on most of the laptops running ubuntu 12.04. I tried a lot of possible solutions available online but nothing seems to work! sudo aplay -l gives: **** List of PLAYBACK Hardware Devices **** card 0: NVidia [HDA NVidia], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 By the way, the Laptop has no HDMI port! I've seen the same problem with Sony laptop but the mic was working with too much static noise. Thank you.

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• How to hide (in Thunar and Nautilus) a directory without putting a dot in its name?

  - by Ivan

  Usually Linux programs store user's settings in ~/.* directories. But unfortunately some developers (of some applications I need) do not follow this rule and don't start their settings storage folders names with a dot. This results in never-user-used folders cluttering (not the right word perhaps, as there are not many, but they annoy anyway) a home directory. Renaming them is not an option, as the applications won't find them in this case (and will create them again). Is there a way to hide a folder having no dot starting its name from being displayed in common file system browsers (I actually use Thunar of XFCE, alongside with Midnight Commander and Krusader, but wouldn't mind to know about Nautilus too).

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• Can't decide between Java or Python for college [on hold]

  - by Will Harrison

  I'm returning to college in about a month for Computer Science. My problem is, I have been programming on the web since I left (4 years ago), using PHP, ASP.NET, and JavaScript. I want to bone up on a more general purpose language that is cross platform before I begin. I would also like to be using a language that is common at my school and I know that they teach the students C++, Java, and Python. I would like to choose between Java or Python but I'm not sure which one. What do you think would be better based on job prospects in the next 2 years and community?

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• Ways to earn money through Flash games

  - by Maged

  If you like developing flash games just for fun, why not make money through them? There are different ways you can monetize your flash game: In Game Ads: Some common examples: Mochi Ads gamejacket ad4game CPMStar InviziAds You can make money by helping online gaming companies test and evaluate new games. Many of those companies are seeking feedback and reviews of their newest games. Find a sponsor and license your game. One of the quickest yet hardest ways to make money from the flash games you create is to find a website who is willing to sponsor them. With a single sponsorship, an individual can make anywhere from $1000-$7000 for a game. What are the best ads from these sites? If the game will be in social websites like Facebook and MySpace, will it still be useful to try other sites? Are there any other ways to earn money from a Flash game?

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• What terminal emulators are available for heavy terminal users?

  - by Noah Goodrich

  I spend a lot of time at the command-line during the workday and at home too since I run Ubuntu exclusively. I've been using the default gnome terminal but I've reached a point where I'd really like to get my terminal tricked out so that my common tasks are as easy as possible. Specifically, I find that I spend of lot of time browsing code in the terminal and working in config files. On my wish list would be: Ability to have multiple screens, tabs, windows (I don't have a preference at this point) that I can easily switch between. Color coding for everything Easy to modify the aesthetics of the terminal (is it vain to want my terminal to look nice?) such as transparency, borders, etc.

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• What makes game sound effects "good"?

  - by you786

  I'm making a small game, and I've found some free sound effects that I'd like to use. The issue is that I can't get the sound effects to sound like they "belong" in my game. I don't know what to look for that can make sound effects match the rest of my game style. I have some ideas on what affects the meshing of audio with graphics. For example, I have a feeling that the current SFX I may be too "realistic" for my graphical style, which is pretty cartoon-like. Also, is there a golden standard for what volume various SFX should be at? (for example, I am thinking that footsteps or other common sounds should be at barely audible volumes, while enemy deaths or something that is a "big deal" should be louder). I found a similar question about graphics, I'm looking for a similar response with sound effects.

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• Cross platform mobile development VS Native Mobile Development: Present And Future.

  - by MobileDev123

  I just completed one year in Smart phone development, working on BlackBerry and Android and also developed one application exclusively targeted to nokia feature phones. And just a month ago I come to know about Titanium Appcelerator tool that enables cross platform development, but there are some developers who complain about it's sub-par functionalities. Even a little bit experience of mine says that developing in native environment rather than these cross platform tools will give you more advantages by giving a developer a chance to add more features with better performance. Do you have same experience? Or you find such cross development tools really useful regarding to advance functionality and performance? As porting (or co developing) same application to different mobile platform is common thing nowadays, what do you think will these cross platform tools evolve and force developers to get a hands on approach on them or majority will stick to the native development environment?

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• SSIS: Building SQL databases on-the-fly using concatenated SQL scripts

  - by DrJohn

  Over the years I have developed many techniques which help automate the whole SQL Server build process. In my current process, where I need to build entire OLAP data marts on-the-fly, I make regular use of a simple but very effective mechanism to concatenate all the SQL Scripts together from my SSMS (SQL Server Management Studio) projects. This proves invaluable because in two clicks I can redeploy an entire SQL Server database with all tables, views, stored procedures etc. Indeed, I can also use the concatenated SQL scripts with SSIS to build SQL Server databases on-the-fly. You may be surprised to learn that I often redeploy the database several times per day, or even several times per hour, during the development process. This is because the deployment errors are logged and you can quickly see where SQL Scripts have object dependency errors. For example, after changing a table structure you may have forgotten to change any related views. The deployment log immediately points out all the objects which failed to build so you can fix and redeploy the database very quickly. The alternative approach (i.e. doing changes in the database directly using the SSMS UI) would require you to check all dependent objects before making changes. The chances are that you will miss something and wonder why your app returns the wrong data – a common problem caused by changing a table without re-creating dependent views. Using SQL Projects in SSMS A great many developers fail to make use of SQL Projects in SSMS (SQL Server Management Studio). To me they are invaluable way of organizing your SQL Scripts. The screenshot below shows a typical SSMS solution made up of several projects – one project for tables, another for views etc. The key point is that the projects naturally fall into the right order in file system because of the project name. The number in the folder or file name ensures that the projects the SQL scripts are concatenated together in the order that they need to be executed. Hence the script filenames start with 100, 110 etc. Concatenating SQL Scripts To concatenate the SQL Scripts together into one file, I use notepad.exe to create a simple batch file (see example screenshot) which uses the TYPE command to write the content of the SQL Script files into a combined file. As the SQL Scripts are in several folders, I simply use several TYPE command multiple times and append the output together. If you are unfamiliar with batch files, you may not know that the angled bracket (>) means write output of the program into a file. Two angled brackets (>>) means append output of this program into a file. So the command-line DIR > filelist.txt would write the content of the DIR command into a file called filelist.txt. In the example shown above, the concatenated file is called SB_DDS.sql If, like me you place the concatenated file under source code control, then the source code control system will change the file's attribute to "read-only" which in turn would cause the TYPE command to fail. The ATTRIB command can be used to remove the read-only flag. Using SQLCmd to execute the concatenated file Now that the SQL Scripts are all in one big file, we can execute the script against a database using SQLCmd using another batch file as shown below: SQLCmd has numerous options, but the script shown above simply executes the SS_DDS.sql file against the SB_DDS_DB database on the local machine and logs the errors to a file called SB_DDS.log. So after executing the batch file you can simply check the error log to see if your database built without a hitch. If you have errors, then simply fix the source files, re-create the concatenated file and re-run the SQLCmd to rebuild the database. This two click operation allows you to quickly identify and fix errors in your entire database definition.Using SSIS to execute the concatenated file To execute the concatenated SQL script using SSIS, you simply drop an Execute SQL task into your package and set the database connection as normal and then select File Connection as the SQLSourceType (as shown below). Create a file connection to your concatenated SQL script and you are ready to go.   Tips and TricksAdd a new-line at end of every fileThe most common problem encountered with this approach is that the GO statement on the last line of one file is placed on the same line as the comment at the top of the next file by the TYPE command. The easy fix to this is to ensure all your files have a new-line at the end.Remove all USE database statementsThe SQLCmd identifies which database the script should be run against.  So you should remove all USE database commands from your scripts - otherwise you may get unintentional side effects!!Do the Create Database separatelyIf you are using SSIS to create the database as well as create the objects and populate the database, then invoke the CREATE DATABASE command against the master database using a separate package before calling the package that executes the concatenated SQL script.    

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• "AND Operator" in PAM

  - by d_inevitable

  I need to prevent users from authenticating through Kerberos when the encrypted /home/users has not yet been mounted. (This is to avoid corrupting the ecryptfs mountpoint) Currently I have these lines in /etc/pam.d/common-auth: auth required pam_group.so use_first_pass auth [success=2 default=ignore] pam_krb5.so minimum_uid=1000 try_first_pass auth [success=1 default=ignore] pam_unix.so nullok_secure try_first_pass I am planning to use pam_exec.so to execute a script that will exit 1 if the ecyptfs mounts are not ready yet. Doing this: auth required pam_exec.so /etc/security/check_ecryptfs will lock me out for good if ecryptfs for some reason fails. In such case I would like to at least be able to login with a local (non-kerberos) user to fix the issue. Is there some sort of AND-Operator in which I can say that login through kerberos+ldap is only sufficient if both kerberos authentication and the ecryptfs mount has succeeded?

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• Oracle VM RAC template - what it took

  - by wcoekaer

  In my previous posting I introduced the latest Oracle Real Application Cluster / Oracle VM template. I mentioned how easy it is to deploy a complete Oracle RAC cluster with Oracle VM. In fact, you don't need any prior knowledge at all to get a complete production-ready setup going. Here is an example... I built a 4 node RAC cluster, completely configured in just over 40 minutes - starting from import template into Oracle VM, create VMs to fully up and running Oracle RAC. And what was needed? 1 textfile with some hostnames and ip addresses and deploycluster.py. The setup is a 4 node cluster where each VM has 8GB of RAM and 4 vCPUs. The shared ASM storage in this case is 100GB, 5 x 20GB volumes. The VM names are racovm.0-racovm.3. The deploycluster script starts the VMs, verifies the configuration and sends the database cluster configuration info through Oracle VM Manager to the 4 node VMs. Once the VMs are up and running, the first VM starts the actual Oracle RAC setup inside and talks to the 3 other VMs. I did not log into any VM until after everything was completed. In fact, I connected to the database remotely before logging in at all. # ./deploycluster.py -u admin -H localhost --vms racovm.0,racovm.1,racovm.2,racovm.3 --netconfig ./netconfig.ini Oracle RAC OneCommand (v1.1.0) for Oracle VM - deploy cluster - (c) 2011-2012 Oracle Corporation (com: 26700:v1.1.0, lib: 126247:v1.1.0, var: 1100:v1.1.0) - v2.4.3 - wopr8.wimmekes.net (x86_64) Invoked as root at Sat Jun 2 17:31:29 2012 (size: 37500, mtime: Wed May 16 00:13:19 2012) Using: ./deploycluster.py -u admin -H localhost --vms racovm.0,racovm.1,racovm.2,racovm.3 --netconfig ./netconfig.ini INFO: Login password to Oracle VM Manager not supplied on command line or environment (DEPLOYCLUSTER_MGR_PASSWORD), prompting... Password: INFO: Attempting to connect to Oracle VM Manager... INFO: Oracle VM Client (3.1.1.305) protocol (1.8) CONNECTED (tcp) to Oracle VM Manager (3.1.1.336) protocol (1.8) IP (192.168.1.40) UUID (0004fb0000010000cbce8a3181569a3e) INFO: Inspecting /root/rac/deploycluster/netconfig.ini for number of nodes defined... INFO: Detected 4 nodes in: /root/rac/deploycluster/netconfig.ini INFO: Located a total of (4) VMs; 4 VMs with a simple name of: ['racovm.0', 'racovm.1', 'racovm.2', 'racovm.3'] INFO: Verifying all (4) VMs are in Running state INFO: VM with a simple name of "racovm.0" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.1" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.2" is in a Stopped state, attempting to start it...OK. INFO: VM with a simple name of "racovm.3" is in a Stopped state, attempting to start it...OK. INFO: Detected that all (4) VMs specified on command have (5) common shared disks between them (ASM_MIN_DISKS=5) INFO: The (4) VMs passed basic sanity checks and in Running state, sending cluster details as follows: netconfig.ini (Network setup): /root/rac/deploycluster/netconfig.ini buildcluster: yes INFO: Starting to send cluster details to all (4) VM(s)....... INFO: Sending to VM with a simple name of "racovm.0".... INFO: Sending to VM with a simple name of "racovm.1"..... INFO: Sending to VM with a simple name of "racovm.2"..... INFO: Sending to VM with a simple name of "racovm.3"...... INFO: Cluster details sent to (4) VMs... Check log (default location /u01/racovm/buildcluster.log) on build VM (racovm.0)... INFO: deploycluster.py completed successfully at 17:32:02 in 33.2 seconds (00m:33s) Logfile at: /root/rac/deploycluster/deploycluster2.log my netconfig.ini # Node specific information NODE1=db11rac1 NODE1VIP=db11rac1-vip NODE1PRIV=db11rac1-priv NODE1IP=192.168.1.56 NODE1VIPIP=192.168.1.65 NODE1PRIVIP=192.168.2.2 NODE2=db11rac2 NODE2VIP=db11rac2-vip NODE2PRIV=db11rac2-priv NODE2IP=192.168.1.58 NODE2VIPIP=192.168.1.66 NODE2PRIVIP=192.168.2.3 NODE3=db11rac3 NODE3VIP=db11rac3-vip NODE3PRIV=db11rac3-priv NODE3IP=192.168.1.173 NODE3VIPIP=192.168.1.174 NODE3PRIVIP=192.168.2.4 NODE4=db11rac4 NODE4VIP=db11rac4-vip NODE4PRIV=db11rac4-priv NODE4IP=192.168.1.175 NODE4VIPIP=192.168.1.176 NODE4PRIVIP=192.168.2.5 # Common data PUBADAP=eth0 PUBMASK=255.255.255.0 PUBGW=192.168.1.1 PRIVADAP=eth1 PRIVMASK=255.255.255.0 RACCLUSTERNAME=raccluster DOMAINNAME=wimmekes.net DNSIP= # Device used to transfer network information to second node # in interview mode NETCONFIG_DEV=/dev/xvdc # 11gR2 specific data SCANNAME=db11vip SCANIP=192.168.1.57 last few lines of the in-VM log file : 2012-06-02 14:01:40:[clusterstate:Time :db11rac1] Completed successfully in 2 seconds (0h:00m:02s) 2012-06-02 14:01:40:[buildcluster:Done :db11rac1] Build 11gR2 RAC Cluster 2012-06-02 14:01:40:[buildcluster:Time :db11rac1] Completed successfully in 1779 seconds (0h:29m:39s) From start_vm to completely configured : 29m:39s. The other 10m was the import template and create 4 VMs from template along with the shared storage configuration. This consists of a complete Oracle 11gR2 RAC database with ASM, CRS and the RDBMS up and running on all 4 nodes. Simply connect and use. Production ready. Oracle on Oracle.

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• Proper fstab entry to mount a samba share in 12.04

  - by JPbuntu

  I am a little confused on the proper fstab entry for a samba share in Ubuntu 12.04 I can get the drive to mount manually by using: sudo mount -t cifs //192.168.2.2/raid_drive /mnt/homeserver -o username=jon,password=password So I tried putting this in fstab: //192.168.2.2/raid_drive /mnt/homeserver cifs username=jon,password=password,iocharset=utf8,mode=0777,dir_mode=07??77 0 0 Which gives me this error in syslog: kernel: [ 2217.925354] CIFS: Unknown mount option mode kernel: [ 2217.936345] CIFS VFS: default security mechanism requested. The default security mechanism will be upgraded from ntlm to ntlmv2 in kernel release 3.3 This guide says to use smbfs although I believe smbfs is deprecated? What is a common fstab configuration for a samba share in Ubuntu 12.04? EDIT: Using the accepted answer below I was initially getting this error message (from dmesg): [ 45.520883] CIFS VFS: Error connecting to socket. Aborting operation [ 45.520990] CIFS VFS: cifs_mount failed w/return code = -115 although it turns out this was due to network connectivity issues, and not related to improper fstab entry.

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• When is a 'core' library a bad idea?

  - by Alex Angas

  When developing software, I often have a centralised 'core' library containing handy code that can be shared and referenced by different projects. Examples: a set of functions to manipulate strings commonly used regular expressions common deployment code However some of my colleagues seem to be turning away from this approach. They have concerns such as the maintenance overhead of retesting code used by many projects once a bug is fixed. Now I'm reconsidering when I should be doing this. What are the issues that make using a 'core' library a bad idea?

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• TFS: Work Items values from External Databases

  - by javarg

  A common question in TFS forums is how to populate list items from external sources in Work Items. Well, there is not a specific functionality to integrate Work Items with external databases or systems when designing them. Actually, you will need to associate your Work Items fields with Global Lists and then have some automated process update this global list regularly. Download this ImportGlobalList.zip file. I’ve put together a simple class (TfsGlobalList) that you can use to update global list items from a .NET application. You could for example, create a simple Console App and schedule it using Windows Scheduler. This App would query a database and then update a TFS Global List using the provided code. Note: the provided code must be run under an account with modify Global List permissions in TFS. Note: remember to refresh Team Explorer in order to see updates in Work Item field values. Enjoy!  

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• Some Adsense domain's ads are causing document.write() statements that remove the html from the page

  - by er1234

  All that is output on the page is the domain name of the advertiser, for example 'www.solar-aid.org'. The rest of the content is stripped, I believe because of a document.write() statement. I'd like to know if this is a common issue or something wrong with our setup. There are three domains causing the issue, which we've blocked from Adsense as a result. solar-aid.org kiva.org grameenfoundation.org Given the type of organizations I think they may be within the default group of 'public service ads' within the Backup Ads setting. If the issue doesn't completely resolve itself soon (one customer of ours complained today, even though I blocked them 5+ days ago), I'll disable public service ads and select the 'fill space with a solid color' option.

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• How to change eclipse font sizes

  - by David M. Karr

  I'm trying to reduce the font sizes used in Eclipse. I've read several notes talking about how to do this, but none of them have made a difference. Obviously, changing it in Eclipse preferences doesn't do it. The common answers about using "Appearance-Fonts" doesn't work, because there is no "Fonts" tab. I believe I saw one person say that the "Fonts" tab isn't supposed to be there anymore. The next suggestion is to install MyUnity and change the font settings there. That appeared to change the fonts used in other apps, like gnome-terminal and window headers, but it still has had no effect on Eclipse.

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• How to build a great relationship with your colleagues

  - by Maria Sandu

  Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-ascii- mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi- mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} When you start new job, you worry about your performance, about being able to do what the manager asks you to do, but you also worry about the relations with your colleagues. How will you get along with them? What if they don’t like you? Have you ever felt you’re „the new guy” and your colleagues have already their own way of talking one to each other, their own jokes? It’s a common feeling and can actually become stressful. I am Norbert, Middleware Presales Intern in Hungary and I’ve been working within Oracle for only 1 month. Joining such a big company has been a challenge from many perspectives. One of them was adapting with the environment and getting to know all my colleagues. You know it’s quite difficult to introduce yourself, to try to liaise with them and find some common topics, so I felt very lucky and comfortable when my manager introduced me to all of my colleagues. It was easier to accommodate and we basically we had a starting point for our discussions. We started to talk about what my position means, for how many years they’ve been within Oracle, other Oracle related topics, but also more personal stuff like what they do after work. Having this opportunity of talking with all of them helped me introduce myself in a proper way and actually I told them many things about myself. Networking wasn’t my best skill, but these first days were really helpful from a network point of view. What else can you do to get along with your colleagues? One second thing I consider as being really helpful in networking is asking work-related questions. For instance, when you don’t know how to do something or don’t understand it, asking one of your colleagues will also help you to make a connection with him and you could easily continue the discussion with some other topics which are more personal. It’s a very effective strategy and in a company like Oracle people are very willing to help you with your tasks and perform at a high level. If you see your colleagues going to lunch, you should join them. It will help you become part of their community, finding out what’s new in their lives, you’ll, step-by-step, take part in their conversations and be up to date with the hot topics they talk about. One other opportunity of becoming part of your colleagues’ community are the internal events. Subscribing to the local free time activities mailing list is very useful for finding out information about when they’re going out and have a drink or attending all sorts of events. For instance, this is how I’ve found out about a party within Oracle that most of the employees here attend. It’s a wonderful opportunity for chatting and make a stronger connection to some of them. How important is attending these events? Think about how much time you spend at work. You’d like to enjoy your work and the environment, so getting along with your colleagues is a nice thing to have. I recently attended a corporate party whose purpose was to facilitate the interaction and communication between employees. It was a real success and we had a lot of fun, especially because it was a costume party.  All the fancy dresses and funny clothes we wore made the atmosphere really enjoyable. It was easy to liaise with colleague with whom I had never interacted with before. There was a friendly spirit among us, chatting about personal stuff and about various pleasant things. Working in an international company is not an easy thing because you interact with many people and they have different styles, but all these opportunities of informal interaction are a good way to adapt to the new working environment.

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• Make Your Own Paper-Craft Enigma Machine [DIY Project]

  - by Asian Angel

  If you love tinkering around with ciphers and want a fun DIY project for the upcoming weekend, then we have just the thing for you. Using common household items you can construct your own personal Enigma machine that will be completely compatible with all the settings of a real Enigma machine (models I, M1, M2 and M3). Visit the second link below for the step-by-step instructions and enjoy putting together this awesome DIY project! PDF Templates for the Enigma Machine Note: This is a direct link for the PDF file itself and the templates are sized for printing on 2 A4 sheets of paper. Enigma/Paper Enigma Instruction Homepage [via BoingBoing] HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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• Best practice for managing dynamic HTML modules?

  - by jt0dd

  I've been building web apps that add and remove lots of dynamic content and even structure within the page, and I'm not impressed by the method I'm using to do it. When I want to add a section or module into a position in the interface, I'm storing the html in the code, and I don't like that: if (rank == "moderator") { $("#header").append('<div class="mod_controls">' + // content, using + to implement line breaks '</div>'); } This seems like such a bad programming practice.. There must be a better way. I thought of building a function to convert a JSON structure to html, but it seems like overkill. For the functionality of the apps I'm using: Node.js JS JQuery AJAX Is there some common way to store HTML modules externally for AJAX importation?

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• Has RFC2324 been implemented?

  - by anthony-arnold

  I know RFC2324 was an April Fools joke. However, it seems pretty well thought out, and after reading it I figured it wouldn't be out of the question to design an automated coffee machine that used this extension to HTTP. We programmers love to reference this RFC when arguing web standards ("418 I'm a Teapot lolz!") but the joke's kind of on us. Ubiquitous computing research assumes that network-connected coffee machines are probably going to be quite common in the future, along with Internet-connected fruit and just about everything else. Has anyone actually implemented a coffee machine that is controlled via HTCPCP? Not necessarily commercial, but hacked together in a garage, maybe? I'm not talking about just a web server that responds to HTCPCP requests; I mean a real coffee machine that actually makes coffee. I haven't seen an example of that.

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• Keystore and Credential Store interplay in OWSM - 11g

  - by Prakash Yamuna

  One of the most common problems faced by customer's is the use of the keystore and it's interplay with the credential store.Here is a picture that describes these relationships.(Click on the picture for a larger image). The picture makes some assumptions in describing the relationship. Some of assumptions are: a) the key used for signing and encryption are the same. b) A keystore can have multiple keys and each key can have it's own alias. In the picture I show only a single key with alias "orakey". c) The keystore being described here is a JKS keystore. Things can vary slightly for other type of keystores. I hope to have a detailed How To that provides the larger picture and then shows these relationships in that context and this picture was created in the context of that How-To. However I think people will find this picture useful on a standalone basis as well. The <serviceInstance> is the entry you will find in jps-config.xml

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• Grub-Efi wrong resolution

  - by Nikki Kononov

  My question, as it comes from the title, related to grub, but it's a different thing. I re-installed Windows 7 and Ubuntu 12.10 in UEFI mode (before that I was using normal BIOS) and everything went perfectly fine. Both systems load as they should but there is one thing that keeps bothering me. The problem is before I installed both systems in UEFI I used to boot in both system using common grub (non-uefi) and resolution in this grub was correct (which is 1366x768). Right now with grub-efi I have wrong resolution (which is seems to be 640x480). So my question is can can I safely set grub-resolution using grub config files or issue is related to something else? (for instance graphics card). I am using Ubuntu 12.10 Intel HD 3000 + Nvidia GT 540M Optimus (I am using bumblebee) Kernel 3.5.0-19-generic all updates installed! I also added ubuntu x-swat ppa for drivers. Thank you for your help!

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• Organization &amp; Architecture UNISA Studies &ndash; Chap 5

  - by MarkPearl

  Learning Outcomes Describe the operation of a memory cell Explain the difference between DRAM and SRAM Discuss the different types of ROM Explain the concepts of a hard failure and a soft error respectively Describe SDRAM organization Semiconductor Main Memory The two traditional forms of RAM used in computers are DRAM and SRAM DRAM (Dynamic RAM) Divided into two technologies… Dynamic Static Dynamic RAM is made with cells that store data as charge on capacitors. The presence or absence of charge in a capacitor is interpreted as a binary 1 or 0. Because capacitors have natural tendency to discharge, dynamic RAM requires periodic charge refreshing to maintain data storage. The term dynamic refers to the tendency of the stored charge to leak away, even with power continuously applied. Although the DRAM cell is used to store a single bit (0 or 1), it is essentially an analogue device. The capacitor can store any charge value within a range, a threshold value determines whether the charge is interpreted as a 1 or 0. SRAM (Static RAM) SRAM is a digital device that uses the same logic elements used in the processor. In SRAM, binary values are stored using traditional flip flop logic configurations. SRAM will hold its data as along as power is supplied to it. Unlike DRAM, no refresh is required to retain data. SRAM vs. DRAM DRAM is simpler and smaller than SRAM. Thus it is more dense and less expensive than SRAM. The cost of the refreshing circuitry for DRAM needs to be considered, but if the machine requires a large amount of memory, DRAM turns out to be cheaper than SRAM. SRAMS are somewhat faster than DRAM, thus SRAM is generally used for cache memory and DRAM is used for main memory. Types of ROM Read Only Memory (ROM) contains a permanent pattern of data that cannot be changed. ROM is non volatile meaning no power source is required to maintain the bit values in memory. While it is possible to read a ROM, it is not possible to write new data into it. An important application of ROM is microprogramming, other applications include library subroutines for frequently wanted functions, System programs, Function tables. A ROM is created like any other integrated circuit chip, with the data actually wired into the chip as part of the fabrication process. To reduce costs of fabrication, we have PROMS. PROMS are… Written only once Non-volatile Written after fabrication Another variation of ROM is the read-mostly memory, which is useful for applications in which read operations are far more frequent than write operations, but for which non volatile storage is required. There are three common forms of read-mostly memory, namely… EPROM EEPROM Flash memory Error Correction Semiconductor memory is subject to errors, which can be classed into two categories… Hard failure – Permanent physical defect so that the memory cell or cells cannot reliably store data Soft failure – Random error that alters the contents of one or more memory cells without damaging the memory (common cause includes power supply issues, etc.) Most modern main memory systems include logic for both detecting and correcting errors. Error detection works as follows… When data is to be read into memory, a calculation is performed on the data to produce a code Both the code and the data are stored When the previously stored word is read out, the code is used to detect and possibly correct errors The error checking provides one of 3 possible results… No errors are detected – the fetched data bits are sent out An error is detected, and it is possible to correct the error. The data bits plus error correction bits are fed into a corrector, which produces a corrected set of bits to be sent out An error is detected, but it is not possible to correct it. This condition is reported Hamming Code See wiki for detailed explanation. We will probably need to know how to do a hemming code – refer to the textbook (pg. 188 – 189) Advanced DRAM organization One of the most critical system bottlenecks when using high-performance processors is the interface to main memory. This interface is the most important pathway in the entire computer system. The basic building block of main memory remains the DRAM chip. In recent years a number of enhancements to the basic DRAM architecture have been explored, and some of these are now on the market including… SDRAM (Synchronous DRAM) DDR-DRAM RDRAM SDRAM (Synchronous DRAM) SDRAM exchanges data with the processor synchronized to an external clock signal and running at the full speed of the processor/memory bus without imposing wait states. SDRAM employs a burst mode to eliminate the address setup time and row and column line precharge time after the first access In burst mode a series of data bits can be clocked out rapidly after the first bit has been accessed SDRAM has a multiple bank internal architecture that improves opportunities for on chip parallelism SDRAM performs best when it is transferring large blocks of data serially There is now an enhanced version of SDRAM known as double data rate SDRAM or DDR-SDRAM that overcomes the once-per-cycle limitation of SDRAM

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• Using <= for every dependency in case of following semantic versioning idea

  - by zerkms

  As Semantic Versioning (and common sense) declares - the major version is incremented in case if non backward compatible change is introduced. Now let's assume we have a project called Project that has a current version 1.0.42 and a library Lib it depends on that is of a 2.1.3 version at the moment. Does that mean that following semver ideology we should constraint the dependency of the Project to be Depends: Lib (< 3)? From my experience - no one does that, but I find it semantically correct and very self-descriptive. What do you think of this?

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• Blank Screen After Ubuntu 12 installation

  - by Atul

  On my dell laptop, running with windows 7, I installed Ubuntu 12. I used it for sometime, then i re-started to switch to windows. First time it got boot up with windows but then it got hanged. I re-started again and then blank screen with blinking cursor came and beep sounds also started to came. I read in few forums and this seems like a common issue with Ubuntu. I tried using the bootable USB for both windows 7 and Ubuntu but none of these are even getting detected. Please let me know if any of know the work-around. Below is configuration" Machine: Dell Studio BIOS: Phoenix OS: Windows 7 Motherboard: Intel

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• Caveat utilitor - Can I run two versions of Microsoft Project side-by-side?

  - by Martin Hinshelwood

  A number of out customers have asked if there are any problems in installing and running multiple versions of Microsoft Project on a single client. Although this is a case of Caveat utilitor (Let the user beware), as long as the user understands and accepts the issues that can occur then they can do this. Although Microsoft provide the ability to leave old versions of Office products (except Outlook) on your client when you are installing a new version of the product they certainly do not endorse doing so. Figure: For Project you can choose to keep the old stuff   That being the case I would have preferred that they put a “(NOT RECOMMENDED)” after the options to impart that knowledge to the rest of us, but they did not. The default and recommended behaviour is for the newer version installer to remove the older versions. Of course this does not apply in the revers. There are no forward compatibility packs for Office. There are a number of negative behaviours (or bugs) that can occur in this configuration: There is only one MS Project In Windows a file extension can only be associated with a single program.  In this case, MPP files can be associated with only one version of winproj.exe.  The executables are in different folders so if a user double-clicks a Project file on the desktop, file explorer, or Outlook email, Windows will launch the winproj.exe associated with MPP and then load the MPP file.  There are problems associated with this situation and in some cases workarounds. The user double-clicks on a Project 2010 file, Project 2007 launches but is unable to open the file because it is a newer version.  The workaround is for the user to launch Project 2010 from the Start menu then open the file.  If the file is attached to an email they will need to first drag the file to the desktop. All your linked MS Project files need to be of the same version There are a number of problems that occur when people use on Microsoft’s Object Linking and Embedding (OLE) technology.  The three common uses of OLE are: for inserted projects where a Master project contains sub-projects and each sub-project resides in its own MPP file shared resource pools where multiple MPP files share a common resource pool kept in a single MPP file cross-project links where a task or milestone in one MPP file has a  predecessor/successor relationship with a task or milestone in a different MPP file What I’ve seen happen before is that if you are running in a version of Project that is not associated with the MPP extension and then try and activate an OLE link then Project tries to launch the other version of Project.  Things start getting very confused since different MPP files are being controlled by different versions of Project running at the same time.  I haven’t tried this in awhile so I can’t give you exact symptoms but I suspect that if Project 2010 is involved the symptoms will be different then in a Project 2003/2007 scenario.  I’ve noticed that Project 2010 gives different error messages for the exact same problem when it occurs in Project 2003 or 2007.  -Anonymous The recommendation would be either not to use this feature if you have to have multiple versions of Project installed or to use only a single version of Project. You may get unexpected negative behaviours if you are using shared resource pools or resource pools even when you are not running multiple versions as I have found that they can get broken very easily. If you need these thing then it is probably best to use Project Server as it was created to solve many of these specific issues. Note: I would not even allow multiple people to access a network copy of a Project file because of the way Windows locks files in write mode. This can cause write-locks that get so bad a server restart is required I’ve seen user’s files get write-locked to the point where the only resolution is to reboot the server. Changing the default version to run for an extension So what if you want to change the default association from Project 2007 to Project 2010?   Figure: “Control Panel | Folder Options | Change the file associated with a file extension” Windows normally only lists the last version installed for a particular extension. You can select a specific version by selecting the program you want to change and clicking “Change program… | Browse…” and then selecting the .exe you want to use on the file system. Figure: You will need to select the exact version of “winproj.exe” that you want to run Conclusion Although it is possible to run multiple versions of Project on one system in the main it does not really make sense.

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