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• Enable networking without the gnome-applet

  - by Ikke

  I've switched to XMonad as my window manager. Sometimes when I put my laptop to hibernate, it's hanging and won't shut down. I have to force it off by pressing the powerbutton for 5 seconds. After I boot again, I can't connect to the internet. I have to logout, go to gnome, and after logging in, I rightclick the network applet icon and select the enable networking options. After that, my internet is working again. Is there a way to do this via the command line or another option?

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• ADF Mobile Client Developer Preview announced!

  - by [email protected]

  Today at the RIM WES conference, Ted Farrell, Chief Architect and SVP, announed the general availability of the ADF Mobile Client Developer Preview.  This is an extension to JDeveloper that allows developers to rapidly develop mobile applications that reside on the mobile device and access a local database and can be used while completely disconnected from the network with a data synchronization technology to get the data back to the server.  You can quickly develop applications declaratively that run on multiple platforms without having to do native coding.  Go download JDeveloper at http://www.oracle.com/technology/software/products/jdev/index.html You can get more info about ADF Mobile Client here at:  http://www.oracle.com/technology/tech/wireless/adf_mobile.html   Check back here for coding examples and how-to's that will be posted regularly.

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• MS Grad Student Project

  - by Bernie Perez

  I'm a computer science grad student at UCLA specializing in security and/or mobile devices. I'm looking for ideas for my M.S. Project. Something with research and experimenting or testing. I have a few in mind, just wondering if the community has some good thoughts. I'm currently working on a project that deals with offload security related operations to a grid-powered/cloud server to improve battery life on phones or tablets, aka Security-Aware software on mobile devices. I might be able to expand on this for my project... but I'm open to any new types of ideas. I have another idea about secure communications with a peer-2-peer ad-hoc network, but its seems a little dull. Hope this questions is not off topic for this StackExchange. I look forward to hearing your thoughts and ideas.

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• Print to File in Black and White (not in greyscale)

  - by user2413

  Hi all, I have these pdf files of c++code and they are colored which would be cool, except that the network printer here is b&w and the printed out codes come in various shades of pale grey which makes them essentially unreadable (specially the comments). I would like everything (text, codes, commands,...) to be printed in the same (black) color. i've tried fuddling with the printer's properties, but the closest thing i see is the 'level of grey' tab, and there i have the choice between 'enhanced' and 'normal' (and it doesn't make a difference in my case). i've tried 'print to file', but i don't see any options there to print to b&w, I've tried installing the 'generic cups printer', but again no options to print to b&w. any idea ? (i'm on 10.10)

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• How to install gnome shell extensions offline?

  - by nosklo

  I know how to go to the https://extensions.gnome.org/ website and download gnome-shell extensions, but now I need to install some extensions available there on a computer without any internet access at all. It is in a internal corporate network and there's no way I can get outside internet access on it, so I must find another way. I can copy files in a usb disk. At my home computer, I have found my extensions at ~/.local/share/gnome-shell/extensions/ but just copying this folder to the target corporate computer didn't do the trick. Running gnome-tweak-tool gives me a "Install Shell Extension" button but I don't know how to download an extension in a format acceptable to install using this button. I have tried to point to the folder above but it didn't work either. What do I need to do?

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• Cannot ping static ip on eth1

  - by Calvin Froedge

  I am trying to ping the network interface I have set up for eth1. This is my config: auto eth1 iface eth1 inet static address 192.168.1.2 netmask 255.255.255.0 gateway 192.168.1.1 broadcast 192.168.1.255 If I ping 192.168.1.2, I get: Ping 192.168.1.2 (192.168.1.2) 56(84) bytes of data. From 192.168.1.3 icmp_seq=3 Destination Host Unreachable Results of ifconfig tell me that the IPv4 address is 192.168.1.3. I can ping this ip. Bcast and Mask are as expected (same as in definition). I can ping 192.168.1.3 from my macbook. I cannot ping 192.168.1.2 locally or from my macbook. Any ideas why?

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• Ask the Readers: How Do You Remote Desktop Access Distant Computers?

  - by Jason Fitzpatrick

  You’re at a computer at point A, but the computer you want to interact with is at point B, and the only thing connecting you is a series of network switches and cabling. How do you comfortably control the remote computer? While there are a variety of ways to control a computer from afar, sometimes there’s just no good substitute for accessing the user interface as if you were sitting at the computer–a feat made possibly by remote desktop software. This week we want to hear about both your favorite remote desktop tool and your best tips for getting the most out of a remote desktop session–from banishing lag to improving mouse-cursor tracking, any tips are fair game. Sound off in the comments below with your remote desktop tips and then check back in on Friday for the What You Said roundup. Java is Insecure and Awful, It’s Time to Disable It, and Here’s How What Are the Windows A: and B: Drives Used For? HTG Explains: What is DNS?

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• wakeonlan from remote host

  - by takeshin

  I have setup wake on lan service on my server. Everything works fine on local area network: root@server$: poweroff user@local$ wakeonlan AA:BB:CC:DD:EE:FF and the server wakes up. AA:BB:CC:DD:EE:FF is a MAC address of my server, which has IP 192.168.1.2 and hostname: example.com. It is connected to the router, which has IP 192.168.1.1 (public: xxx.xxx.xxx.xxx) When the server is up, I can ping: ping example.com or login via ssh: ssh [email protected] So far, so good. Now I'm able to wake the server up from local area, but how to wake the server from the remote location? I tried: user@local$ wakeonlan -i xxx.xxx.xxx.xxx AA:BB:CC:DD:EE:FF, but it does not work (nothing happens;). Do I have to configure my router somehow to forward magic packets? How?

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• frame lock networking

  - by kochol

  I'm developing an RTS game and I want to add multiplayer support to my game. I picked the easiest technique to implement for start frame locking technique. I used server client networking architecture (I think it's my first mistake I think using peer to peer is a better one for this) On game update every clients send their commands and maybe receive some command then render the frame and wait for all clients to send their update complete message then all of them can go for the next frame. I send commands and all logic is calculated on the clients based on commands but the clients can go out of sync easily. Every AI controlled units make different decisions on each clients What I have to do to sync my game? Do you suggest me a better network architecture or technique?

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• Java EE/GlassFish Adoption Story by Kerry Wilson/Vanderbilt University

  - by reza_rahman

  Kerry Wilson is a Software Engineer at the Vanderbilt University Medical Center. He served in a consultant role to design a lightweight systems integration solution for the next generation Foundations Recovery Network using GlassFish, Java EE 6, JPA, @Scheduled EJBs, CDI, JAX-RS and JSF. He shared his story at the JavaOne 2013 Sunday GlassFish community event - check out the video below: Kerry outlined some of the details of the implementation and emphasized the fact that Java EE can be a great solution for applications that are considered small/lightweight. He mentioned the productivity gains through the modern Java EE programming model centered on annotations, POJOs and zero-configuration - comparing it with competing frameworks that aim towards similar productivity for lightweight applications. Kerry also stressed the quality of the excellent NetBeans integration with GlassFish and the need for community self-support in free, non-commercial open source projects like GlassFish. You can check out the details of his story on the GlassFish stories blog. Do you have a Java EE/GlassFish adoption story to share? Let us know and we will highlight it for the community.

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• Java EE/GlassFish Adoption Story by Kerry Wilson/Vanderbilt University

  - by reza_rahman

  Kerry Wilson is a Software Engineer at the Vanderbilt University Medical Center. He served in a consultant role to design a lightweight systems integration solution for the next generation Foundations Recovery Network using GlassFish, Java EE 6, JPA, @Scheduled EJBs, CDI, JAX-RS and JSF. He lives in Nashville, TN where he helps organize the Nashville Java User Group. Kerry shared his Java EE/GlassFish adoption story at the JavaOne 2013 Sunday GlassFish community event - check out the video below: Here is the slide deck for his talk: GlassFish Story by Kerry Wilson/Vanderbilt University Medical Center from glassfish Kerry outlined some of the details of the implementation and emphasized the fact that Java EE can be a great solution for applications that are considered small/lightweight. He mentioned the productivity gains through the modern Java EE programming model centered on annotations, POJOs and zero-configuration - comparing it with competing frameworks that aim towards similar productivity for lightweight applications. Kerry also stressed the quality of the excellent NetBeans integration with GlassFish and the need for community self-support in free, non-commercial open source projects like GlassFish.

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• Sterci today announced it has earned Oracle Exadata and Oracle Exalogic Optimized status

  - by Javier Puerta

  Sterci has announced it has earned Oracle Exadata and Oracle Exalogic Optimized status. (Read full announcement here) "GTExchange from Sterci is a high-performance multi-network and multi-standard financial messaging solution that provides a comprehensive connection hub to SWIFT and other networks, as well as handling internal message transfer. It supports high volume and complex message flows from multiple counterparties, delivering control, transparency and proven efficiencies. By achieving Oracle Exadata Optimized and Oracle Exalogic Optimized status, Sterci has shown that its GTExchange solution has achieved a 3.8 x greater throughput (nearly 4 million messages an hour), than any previous tests on comparable x86 systems." 

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• How should I store and secure self-signed certificates?

  - by Anthony Mastrean

  I'm fairly certain I shouldn't commit certificates into source control. Even if the repository is private and only authenticated coworkers (for example) have access to it. That would allow for accidental exposure (thumb drives, leaked credentials, whatever). But, how should I store and secure certificates? I don't suppose I should just plop them on the network file server, for some of the same reasons I wouldn't put them into source control, right? Is there some kind of secure certificate store that I can run? Does the Java "keystore" do that generally or is it specific for like weblogic servers or something?

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• Hurricanes Since 1851 [Visualization]

  - by Jason Fitzpatrick

  Much like you can map out volcanic eruptions to create a neat pattern around the Pacific Ring of Fire, you can also map out hurricanes and tropical storms. Check out this high-resolution visualization to see the pattern formed by a century and a half of storms. Courtesy of UXBlog and data from the National Oceanic and Atmospheric Administration, the above projection shows the path of tropical storms around the equator (the perspective, if the map looks unfamiliar to you, is bottom up with Antarctica and the lower portion of South America in the center). For a full resolution copy of the image and more information about how it was rendered, hit up the link below. Hurricanes Since 1851 [via Cool Infographics] How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• How to Automatically Clean Your Linux PC with Cruftbuster

  - by Zainul Franciscus

  Do you have folders filled with myriad of files that need a serious spring cleaning ? If you do, we have Cruftbuster, an automated self-cleaning tool for Linux, to sort out your messy folders. Well, you can always move these files, or trash them, but why bother doing that if you can have your computer do that automatically for you. This is exactly what Cruftbuster does; It is a freeware for Linux to organize your files. Editor’s Note: this piece of open-source software was created by Zainul Franciscus, a writer here at How-To Geek. Naturally, we need a disclaimer, so if this breaks your PC or deletes the wrong files, don’t blame us. Backup your data!What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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• Send arbitrary commands to modem for info

  - by mydoghasworms

  I have a USB 3G data card and modem. According to the supplier, to check the data balance on the account, I must dial a number like *89# (or whatever) from the handset. The device appears as a ppp0 interface in my network devices. How does one go about issuing commands to the modem to send the commands and receive back the information? UPDATE: OK, I found some help here: http://www.linuxquestions.org/questions/linux-hardware-18/sending-at-commands-to-a-sms-modem-372445/, but firstly, there are 3 ttyUSB devices on my system, and I assume that one of them is the 3G modem, but how can I tell? Secondly, trying to echo something to two of them says that the device is busy, which stands to reason, because I am using it to connect to the internet. Some help, please?

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• Lockdown Your Database Security

  - by Troy Kitch

  A new article in Oracle Magazine outlines a comprehensive defense-in-depth approach for appropriate and effective database protection. There are multiple ways attackers can disrupt the confidentiality, integrity and availability of data and therefore, putting in place layers of defense is the best measure to protect your sensitive customer and corporate data. “In most organizations, two-thirds of sensitive and regulated data resides in databases,” points out Vipin Samar, vice president of database security technologies at Oracle. “Unless the databases are protected using a multilayered security architecture, that data is at risk to be read or changed by administrators of the operating system, databases, or network, or hackers who use stolen passwords to pose as administrators. Further, hackers can exploit legitimate access to the database by using SQL injection attacks from the Web. Organizations need to mitigate all types of risks and craft a security architecture that protects their assets from attacks coming from different sources.” Register and read more in the online magazine format.

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• Q&amp;A: What is the UK pricing for the Windows Azure CDN?

  - by Eric Nelson

  The pricing for Windows Azure Content Delivery Network (CDN) was announced last week. The prices are: £0.091 per GB transferred from North America & Europe locations £0.1213 per GB transferred from other locations £0.0061 per 10,000 transactions CDN rates are effective for all billing periods that begin subsequent to June 30, 2010. All usage for billing periods beginning prior to July 1, 2010 will not be charged. To help you determine which pricing plan best suits your needs, please review the comparison table, which includes the CDN information. Steven Nagy has also done an interesting follow up post on CDN. Related Links: Q&A- How can I calculate the TCO and ROI when considering the Windows Azure Platform? Q&A- When do I get charged for compute hours on Windows Azure? Q&A- What are the UK prices for the Windows Azure Platform

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• Skipping video and audio with PS3MediaServer

  - by MaxMackie

  I'm using the latest PS3MediaServer build right from the repos suggested in the Ubuntu Wiki. I'm streaming multiple movies from my server (Ubuntu 10.04 LTS) to my PS3 over wireless. Sometimes, during some movies, the audio and the video will begin skipping. This can last anywhere between 5 and 30 seconds before it goes back to normal. I have a four core i5 processor and 8GB of DDR3 RAM so I don't think my computer is having a hard time keeping up with the transcoding. So this leads me to believe it's either sub-optimal transcoding options from within PS3MS or my network can't handle the heat. Other than the out-of-box configuration, is there any way I can tweak the settings for the application to use my resources more efficiently?

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• Accidentally uninstalled Ubuntu 14.04 system settings. How to get them back?

  - by Dan

  Somehow, cleaning up useless software (using software center), I uninstalled Ubuntu "system settings". I did this by mistake. Now I fail to find system settings application using software center (and there are so many items in history...). It seems strange to me because usually when I try to uninstall something critical (system testing for example), the dependencies manager tells me It will uninstall the whole desktop system then. I am sure I did not have that warning. So I need the name of the software to install or a command line command rather than a system restore to get it back. Very interesting thing. If you ever want to play with this and reproduce it, you will be confused to see Ubuntu Mobile system settings instead! Yes, mobile network and touchscreen settings! Happy pre-release viewing!

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• Apt-get update through tor

  - by Alexander

  I'm trying to update my apt-get list. In my country a lot of sites are blocked or have been blocked from companies. When I use a proxy for the whole system I get errors, tor works perfectly when browsing. My question is can I update apt-get through a connection from tor? I mean I want to unblock the blocked sites using tor connection so I can perform "apt-get update" without errors ... Thanks in advance. Edit BTW : I'm using Ubuntu 13.10 and Tor 0.2.21 alexander@Alexander-PC:~$ sudo apt-get update [sudo] password for alexander: Ign http://extras.ubuntu.com saucy InRelease Ign http://security.ubuntu.com saucy-security InRelease Ign http://us.archive.ubuntu.com saucy InRelease Hit http://extras.ubuntu.com saucy Release.gpg Get:1 http://dl.google.com stable InRelease [1,540 B] 100% [1 InRelease gpgv 1,540 B] [Waiting for headers] [Waiting for headers] [WaSplitting up/var/lib/apt/lists/partial/dl.google.com_linux_chrome_deb_dists_stabIgn http://dl.google.com stable InRelease E: GPG error: http://dl.google.com stable InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?

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• Harry Foxwell talks about "Oracle Solaris 11 System Administration: The Complete Reference"

  - by Glynn Foster

  In a previous blog entry, New Oracle Solaris 11 Administration book, I blogged about the fact that a new book has been written to provide an excellent resource for administrators starting to learn some of the new features in Oracle Solaris 11. Despite an extensive set of online resources from the Oracle Technology Network, it's also useful to have something in the bookshelf that you can quickly refer to - and Harry Foxwell and his team of co-authors have done just that. Check out the video below where Harry goes into detail about why the book was written, details about the target audience, and what he's excited about in Oracle Solaris 11. Best of all though, is the fact that this is a brilliant book for any inspiring Linux administrator who wants to start getting to know the Oracle Solaris operating system a little better.

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• Unable to get screen signal after purge FGLRX

  - by Boris

  I thought that my ATI driver was not running well so I wanted to re-instal it completely. I did: sudo apt-get remove --purge fglrx* sudo apt-get remove --purge xserver-xorg-video-ati xserver-xorg-video-radeon and after a boot I wanted to intal the ATI driver BUT at the boot no more signal to my screen. Since, every time I turn on my PC it gets to purple screen and then screen shuts down ! Note that: Even if the screen is off, PC seems to be running almost well: I m still able to use my network to access data shared with NFS. Using live USB I have no screen problem. I tried to plug my screen on an alternative output but it did not work. I tried CTRL+ALT+F1 while being on purple screen but it does not do anything, screen shut down anyway. I m going to try the SHIFT thing and learn from blackscreen wiki...

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• Presentations on OVCA & OVN

  - by uwes

  The following three presentations regarding Oracle Virtual Compute Appliance and Oracle SDN from Oracle Open World sessions are now available for download from eSTEP portal. Oracle Virtual Compute Appliance: From Power On to Production in About an Hour Charlie Boyle and Premal Savla give an overview of the Oracle Virtual Compute Appliance. This presentation is a mix of the business and technical slides. Rapid Application Deployment with Oracle Virtual Compute Appliance Kurt Hackel and Saar Maoz, both in Product Development, explain how to use Oracle VM templates to deploy applications faster and walk through a demo with Oracle VM templates for Oracle Database.  Oracle SDN: Software-Defined Networking in a Hybrid, Open Data Center Krishna Srinivasan and Ronen Kofman explain Oracle SDN and provide use cases for multi-tenant private cloud, IaaS, serving Tier 1 application and virtual network services. The presentation can be downloaded from eSTEP portal. URL: http://launch.oracle.com/ PIN: eSTEP_2011 The material can be found under tab eSTEP Download Located under: Recent Updates and Engineered Sysytems/Optimized Solutions

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• Canon Mx772 printer recognized, drivers loaded...but all print jobs "Held"

  - by user212169

  BRAND NEW to Ubuntu but loving it so far. I have a Canon MX772 wireless printing running on my network and am able to print fine from a PC and Mac. Using the printers IP, Ubuntu was able to find it and I accepted all of the "recommended" items (it found a Canon MX770 driver). Everything seems to load fine...but the test page does not print, nor does any print commands make it to the printer. If I open the print dialogue jobs are shown as "held" and when I look at the jobs attributes, I see "Job printer state message=cannot specify model number" and then a few lines down "job state reasons=aborted by system". If I try to "resume" it immediately goes back to "held". I can successfully ping the IP of the printer. Would be very appreciative of other ideas...printing is the last check in the box before I am all set up. Thanks!

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