Registar
Resultados 1 a 6 de 6

Tópico: Linux Ubuntu

  1. #1
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)

    Linux Ubuntu

    How Ubuntu 16.04 Is Performing Compared To Five Other Linux Distributions

    As it's been a month since our last large Linux distribution comparison (a 10-way Linux distribution battle), here are some fresh benchmarks of six Linux distributions to see how their out-of-the-box performance compares. From a Core i7 Broadwell system, the updated versions of Clear Linux, Fedora 23, CentOS 7, openSUSE 42.1, Ubuntu 15.10, and Ubuntu 16.04 LTS were compared.
    The distribution comparison this month took place on an Intel Core i7 5775C (Broadwell) system with Iris Graphics. The same system with i7-5775C, MSI Z97-G45 GAMING motherboard, 16GB of RAM, and 120GB Crucial SSD were tested when doing clean installations of each of these six Linux distributions.
    Everything was tested out-of-the-box as usual. (For new readers, the CPU frequency was maintained the same throughout; with the system graph the clock speed difference is just different since Clear Linux was using the ACPI CPUFreq scaling governor on Clear Linux while the others were using P-State. The P-State governor reports the turbo speed via sysfs while CPUFreq reports the base clock frequency.)
    To simplify some of the prominent differences between these six Linux operating systems:
    - Intel's Clear Linux 6430 distribution used the Linux 4.4.2 kernel, GCC 5.2.0 compiler, and used an EXT4 file-system by default. Clear Linux was the only distribution defaulting to the CPUFreq performance governor rather than P-State. Clear Linux was one of the major winners of the last comparison as it's a server-oriented distribution by Intel that prides itself upon high performance with taking some rather aggressive defaults and other optimizations.
    - Fedora 23 is currently up to the Linux 4.3.5 kernel, GCC 5.3.1 compiler, and an EXT4 file-system by default. For graphics tests there is Mesa 11.1.0.
    - CentOS 7 uses the Linux 3.10 kernel, GCC 4.8.5, Mesa 10.6.5, and defaults to an XFS file-system.
    - OpenSUSE 42.1 Leap has the Linux 4.1 kernel, GCC 4.8.5, and its home directory is an XFS file-system from where the benchmarks were conducted. Mesa 11.0.8 is available on OpenSUSE 42.1. OpenSUSE along with Ubuntu were the distributions in this comparison defaulting to the deadline I/O scheduler while the others were using CFQ by default.
    - Ubuntu 15.10 has the Linux 4.2 kernel, GCC 5.2.1, and Mesa 11.0.2. Ubuntu uses EXT4 by default.
    - Ubuntu 16.04 in its current development state has the Linux 4.4 kernel, GCC 5.3.1 compiler, EXT4 file-system, and Mesa 11.1.2.
    All of these Linux distribution benchmarks were carried out in a fully-automated and reproducible manner using the open-source Phoronix Test Suite benchmarking software.
    Toda a analise:
    http://www.phoronix.com/scan.php?pag...feb-6way&num=1
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  2. #2
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Ubuntu gives up on AMD’s Catalyst Linux driver



    Fglrx is not for us


    Ubuntu 16.04 LTS and its newer incarnations will not support AMD's widely-used Catalyst Linux (fglrx) driver.

    To be fair even AMD has given up on the proprietary AMD driver in favour of encouraging users to use the open-source AMDGPU/Radeon drivers.
    However although the fglrx/Catalyst driver is hated by Linux gamers, they will be a little miffed because the open-source driver only has OpenGL 4.1 support compared to OpenGL 4.5 in Catalyst.It also has lower performance in common gaming workloads, incomplete OpenCL compute support, and no CrossFire multi-GPU support.
    AMD has promised that the new AMDGPU driver stack will have all the missing bits, but that is months away from being ready and will help those with the latest Radeon GPUs. The fglrx-free Ubuntu 16.04 is set to ship in April which will leave many high and dry for a while.
    Noticia:
    http://www.fudzilla.com/news/graphic...t-linux-driver
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  3. #3
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Dell Brings Ubuntu Linux 14.04 To XPS 13 Developer Edition Laptop

    Wondering where the love for Linux is from big box OEMs? Look no further than Dell and its XPS 13 Developer Edition laptops. Also known as "Project Sputnik," Dell came up with the idea of offering developers a powerful and thin XPS notebook running Linux and launched its first models over three years ago. Now in its 5th generation, Project Sputnik is still going strong today with the latest models combining Ubuntu 14.04 with Intel's Skylake processors.

    To kick off its newest generation of Developer Edition laptops, Dell is offering three Core i7 configurations, including two that feature 16GB of RAM, which is something Dell received a lot of requests for. Dell said it also plans to add a Core i5 option to the Developer Edition lineup sometime down the line.


    Cost of entry into Developer Edition territory runs $1,550. What that gets you is a 13.3-inch QHD+ (3200x1800) InfinityEdge touch display powered by an Intel Core i5-6560U processor, 8GB of LPDDR3 1866 RAM, and Intel Iris Graphics 540. The base model also comes with a 256GB PCIe-based solid state drive, 720p webcam, two USB 3.0 ports, Thunderbolt 3/USB 3.1 Gen 2, 3-in-1 card reader, and DisplayPort 1.2 video output. The system also comes with an adapter that adds VGA, HDMI, and GbE LAN.

    The middle model costs $1,950 and doubles the RAM and storage to 16GB and 512GB, respectively, and at the top end, the $2,350 XPS Develop Edition bumps the storage to a capacious 1TB.

    We've played with the Windows-powered models of the XPS 13 and were impressed with the build quality. These thin and light systems feature a chassis that's precision cut from a single block of aluminum and strapped with carbon fiber in the keyboard and palm rest area. And then of course there's that gorgeous Infinity Edge display that sports almost no bezel. While we hate to automatically compare such things to a Mac, theses systems are every bit as nice as the MacBook Air (actually nicer in our opinion and more powerful).

    As for Linux, Dell is seeing increased interest from customers. In addition to the XPS Developer Edition, Dell offers Ubuntu on its Precision 5510, 3510, 7510, and 7710 mobile workstations, as well as its Precision M3800.

    If you haven't seen the XPS 13 before, here's our video review of the 2015 model, which will give you a good feel for the design and build quality of the machine, which is the same as the Ubuntu-enabled versions, mechanically. However, this machine is based on previous gen Intel Broadwell technology rather than the most recent Skylake platform versions that we reviewed here recently.






    Noticia:
    http://hothardware.com/news/dell-ubu...RrJthZ4R7UB.99
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  4. #4
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    How to Download and Run “Bash on Ubuntu on Windows 10”


    The latest Windows 10 Insider Preview Build 14316 brought in a ton of new features, including Windows Subsystem for Linux. Aimed at developers, the subsystem is added in the latest test iteration of Windows 10 to allow developers to use Linux utilities without using a VM or a remote system. Windows 10 Anniversary Update slated for release this summer, will bring the ability to use Bash to run command-line Linux applications. As Microsoft has offered a preview of several features of the Anniversary Update in the latest Build 14316, running Bash on Windows 10 is also one of them.
    You can enroll in Windows Insider Program to take a look at all the new features of Windows 10 14316. Once enrolled, follow this guide to run Ubuntu on Windows 10.

    How to run Ubuntu on Windows 10

    In this guide, we will help you run Ubuntu on Windows 10. Once in, you will be running Ubuntu 14.04 “trusty,” and can also install the tools that you need, using the Apt package manager.
    Advertisements


    • Visit this page to enroll in Windows Insider Program.
    • Under System Settings, select Advanced Windows Update options.
    • Set your update type to the Fast ring.
    • Go to the Settings app on your PC.
    • Click on Update & Security > For Developers > toggle Developer mode on.
    • Check for new updates and apply them. You are looking for the Insider Preview 14316.
    • Restart your computer.
    • Search for Windows Features > Turn Windows features on or off.
    • Enable Windows Subsystem for Linux (Beta) in the Windows features.
    • Reboot your computer.
    • Search for Bash in the Start menu. Alternatively, open Command Prompt and type bash.
    • This will prompt you to install Ubuntu on Windows 10. Once you accept the terms and conditions, the subsystem is then downloaded for you from the Windows Store. Note that this is 1GB heavy download, so you might want to do it on a faster internet connection.
    • Once it’s downloaded, search for Bash on Ubuntu on Windows from the Start Menu.

    How to Reposition the Keyboard in Windows 10 Mobile Devices




    You will now be able to use Linux utilities, without having to run a virtual machine or a remote system. Bash on Windows 10 has access to your Windows filesystem, so you will be able to work on the same files from within Bash.

    Remember, this is not technically Linux, as you are running a userspace version of Ubuntu, running on WSL (not Linux kernel). But, you will be able to run Bash shell commands, Bash scripts, and Bash shell tools. Microsoft also says that Ubuntu on Windows 10 allows you to run Linux-first tools like Ruby and Python directly on Windows.
    For more, please visit Microsoft.



    Noticia:
    http://wccftech.com/how-to-run-ubuntu-on-windows-10-guide/#ixzz45AYnh6Bn












    Several Linux Kernel Vulnerabilities Patched in Ubuntu

    Several patches have been released for Ubuntu, addressing vulnerabilities in the Linux kernel, including a use-after-free and a timing side-channel vulnerability.

    Ubuntu patches kernel exploits

    Ubuntu has received security updates for several vulnerabilities that could be exploited for denial-of-service (DoS) attacks and arbitrary code execution. Released on Wednesday, the advisory recommends users to patch if they are running 14.04 LTS (long term support) or any derivative builds. Over eight vulnerabilities have been patched in Ubuntu 14 and Ubuntu 15 variants, including Trusty Tahr, Utopic Unicorn, Wily Werewolf, and Raspberry Pi 2, SecurityWeek has reported.
    Four of these flaws affect Ubuntu 14.04, one of which is a use-after-free vulnerability (CVE-2015-8812) in the CXGB3 driver, discovered by Venkatesh Pottem of Red Hat Engineering. The latest patch fixes this flaw where a local attacker could exploit the vulnerability to carry out a DoS attack, causing the system to crash, possibly allowing for arbitrary code execution.
    Found by David Herrmann, the second vulnerability (CVE-2016-2550) is triggered because the Linux kernel “incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket.” This flaw could also be exploited to carry out DoS attacks by a local, unauthenticated attacker.
    Advertisements

    A third issue (CVE-2016-2085) was discovered by Xiaofei Rex Guo where he discovered that an attacker could disrupt the integrity of the system by exploiting a timing side channel vulnerability. This flaw existed in the Linux Extended Verification Module (EVM). EVM prevents tampering in the Linux kernel and helps validating extended attributes before allowing operations on the files.
    The fourth resource exhaustion issue (CVE-2016-2847) was discovered, where the kernel failed to enforce limits on the amount of data allocated to buffer pipes. This flaw also would have exhausted the resources.
    Malware Targeting Linux-Based Servers Discovered for Sending Spam Messages




    A few other security issues were also fixed in other versions of Ubuntu, including in Debian. Some of these exploits also affect Red hat products, however, they are being termed of low or medium severity. While Red Hat is yet to release the patch, users on Ubuntu 12.04 LTS and 15.10 are recommended to update to get the patch for the vulnerabilities affecting their systems.
    Source


    Noticia:
    http://wccftech.com/several-linux-ke...#ixzz45AZPcwHW


    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  5. #5
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Bash for Windows 10 Unfazed by Deadliest Linux Command


    Linux Bash shell came to Windows 10 recently as part of the latest Windows Insider preview build. Immediately, people began to experiment, some to see how well the shell was implemented, while others went straight for a command capable of wiping the entire system on a Linux operating system “rm -rf /”.
    For those not familiar with Linux and the Bash shell, the reason this command is so deadly can be broken down into its three parts. “rm” is the command for removing or deleting files. “-rf” contains the additional commands for recursive and force. In combination, this causes all files, folders, and subfolders to be removed, without providing any prompt for the user, even those which are write protected. Finally, “/” represents the root location of the file system, where all files and folders are stored and where the command will look for files to delete. Often usage of this command is restricted or generates a warning on modern Linux systems as, should it be executed, everything will be deleted.
    This danger made it an obvious choice to try out on Windows 10’s Bash shell though you would hope it was tried from the safety of a virtual machine or throwaway installation. Fortunately (or unfortunately), this command doesn’t cause anywhere near the damage it does to Linux, although the Bash terminal itself is not so lucky, being reduced to a useless black window when started up.




    Carmen Crincoli ‎@CarmenCrincoli
    @DrPizza @bdsams Have you tried running the environment elevated? Least Privs w/default launcher.

    Follow
    Scott Hanselman ‎@shanselman

    @CarmenCrincoli @DrPizza @bdsams root on Linux != root on Windows. Would need to launch as admin then go to /Mnt/c to do damage.









    Windows isn’t fully safe from misuse of the Bash shell, as if you run the terminal as administrator and target the /mnt/c directory, the C drive can be deleted. Although, with the lengths you have to go to in order to wipe your operating system, if it happens then it’s likely your own fault, and really, it’s no more dangerous than the command line already in Windows.
    Noticia:
    http://www.eteknix.com/bash-windows-...linux-command/
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  6. #6
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Windows 10’s Bash Fling Produces Linux GUI App Offspring For Windows Desktop

    We learned a couple of weeks ago that Microsoft and Canonical would be teaming up to bring some Linux goodness to Windows 10, and a mere week later, we saw the functionality hit the 14316 Insider Preview build. With that build now in the hands of tinkerers, some neat features are now being discovered.
    After Microsoft made the mind-blowing announcement that Linux's BASH terminal would be supported on Windows 10, many began to wonder if it'd be possible to initiate an X server (the accelerated window manager for Linux) to run GUI applications. In its shipping form, both Microsoft and Canonical expect people to use only command-line based applications in the BASH terminal, but as it happens, you are able to run some GUI apps, as long as you don't mind the experience being less-than-intuitive.
    image: http://hothardware.com/ContentImages/NewsItem/37084/content/small_Linux_on_Windows.jpg
    As the shot above highlights, reddit user w2qw managed to run the xeyes toy and the GUI version of VIM. Neither of those are that impressive, but check out Firefox. While no one would run Firefox this way, given that there's a native Windows client, the fact that loading the Linux version on Windows is possible really does highlight how powerful this BASH functionality can be. Firefox requires quite a number of dependencies and it could have easily broke right from the get-go. Instead, it appears to be running just fine.
    In his post, w2qw recommends heading over to the xming Sourceforge page and then run an application through it using the switch 'DISPLAY=:0 Firefox' (without quotes; Firefox can be replaced with another application). It's noted that performance isn't going to be ideal, but that likely won't surprise anyone. Performance penalties don't take away from the coolness of this actually being possible. Running Windows apps in Linux has been done for ages, but vice versa? It's impressive to see that in action.


    Noticia:
    http://hothardware.com/news/windows-...Avb5hPhOxUF.99
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

 

 

Informação da Thread

Users Browsing this Thread

Estão neste momento 1 users a ver esta thread. (0 membros e 1 visitantes)

Bookmarks

Regras

  • Você Não Poderá criar novos Tópicos
  • Você Não Poderá colocar Respostas
  • Você Não Poderá colocar Anexos
  • Você Não Pode Editar os seus Posts
  •