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Updated: 1 hour 41 min ago

TuxMachines: Leftovers: OSS

6 hours 26 min ago

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Reddit: Permissions issues with adding folders to the root of a CIFS mounted folder on a ZFS share

6 hours 26 min ago

ZFS appliance hosts the share, primarily accessed by windows clients, but have one CentOS server that also needs access to it (and it's a god damned snowflake).

So generalized working setup is:

//zfsappliance/share/project /A /B /C

And /etc/fstab entry:

//zfsappliance/share/project /mnt/project cifs user=user,password=pass,rw,exec,file_mode=0777,dir_mode=0777 0 0

Where A, B, ..., are separate projects. This all works as it should. The issue is when we try to add an additional project folder 'D' to the root of the share. The linux server can see that 'D' is a folder in that share, but it cannot even list the contents of it. Even setting (via windows) the permissions of 'D' to exactly that of 'B', we get 'permission denied'.

getcifsacl on the existing folders returns the expected ACLs, on the new folder it returns getxattr error: 13 (permission denied).

Have tried mount -a and mount -o remount /mnt/project as well as manually mounting in in a different spot with mount -v -t cifs -o user=user,password=pass //zfsappliance/share/project /mnt/test and it all results in the same issue:

A, B, and C are all accessible as they should be from the linux box while D remains unaccessible.

No errors are given when manually mounting and there are no errors in /var/log/messages or /var/log/samba/log.smbd.

Adding the utility user whose credentials are used to mount the share directly to the folder's permissions (via windows) allows access as expected, but not when it's just the group (which also contains the utility user) added as it should be and as it works on existing project folders A, B, C, etc..

Here's the thing:

The established workaround for this issue with this server has been to restart it. This causes the share to be mounted with correct permissions on new folders added at the root of the mounted share. That worked back when this was a smaller company working on one project at a time. We can no longer restart this server without significant downtime for the entire company as there is constant read/writes from the linux server to the share.

Is there some way to... trigger the mount to ask for updated permissions? Clear a cache?

submitted by /u/nixthrowaway123123
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Reddit: Should we make a stickied post for building a Linux machine?

6 hours 49 min ago

Based on recent market products and driver support etc. It might be beneficial to have a running post for ideas on which video cards, CPUs etc would work best for someone looking to build a machine themselves.

I suppose this would be most useful for basing ideas around groups such as gaming vs hosting server vs image processing/pattern recognition etc


submitted by /u/hydraloo
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LXer: Quantum computing for everyone, a programmer's perspective

7 hours 6 min ago
About a week ago, IBM launched Quantum Experience. The cornerstone of this initiative is to make a real, working quantum computer available for anyone. This blog discusses Quantum Experience, gives the basics while trying to dwell as little as possible on Algebra or Physics and, at the end, we’ll build a simple algorithm and discuss the results.

TuxMachines: Security Leftovers

7 hours 39 min ago
  • Java and Python FTP attacks can punch holes through firewalls

    The Java and Python runtimes fail to properly validate FTP URLs, which can potentially allow attackers to punch holes through firewalls to access local networks.

    On Saturday, security researcher Alexander Klink disclosed an interesting attack where exploiting an XXE (XML External Entity) vulnerability in a Java application can be used to send emails.

  • Microsoft: no plans to patch known bugs before March [Ed: Microsoft is keeping open 'back doors' that are publicly known about, not just secret ones]

    Microsoft has no plans to issue updates for two vulnerabilities, one a zero-day and the other being one publicised by Google, before the scheduled date for its next round of updates rolls around in March.

    The company did not issue any updates in February, even though it had been scheduled to switch to a new system from this month onwards.

    It gave no reason for this, apart from saying: "This month, we discovered a last minute issue that could impact some customers and was not resolved in time for our planned updates today.

    "After considering all options, we made the decision to delay this month’s updates. We apologise for any inconvenience caused by this change to the existing plan."

    The Google-disclosed bug was made public last week, and is said to be a flaw in the Windows graphic device interface library that can be exploited both locally and remotely to read the contents of a user's memory.

  • Microsoft issues critical security patches, but leaves zero-day flaws at risk

    Microsoft has patched "critical" security vulnerabilities in its browsers, but has left at least two zero-day flaws with public exploit code.

    The software giant released numerous patches late on Tuesday to fix flaws in Adobe Flash for customers using Internet Explorer on Windows 8.1 and later, as well as Edge for Windows 10.

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LinuxToday: OpenStack Ocata Improves Cloud Usability and Federation

7 hours 39 min ago

eWEEK: The 15th release of the open-source OpenStack cloud platform is now available, with better container services integration, improved cloud federation and an enhanced dashboard.

LXer: Best practices for guiding new coders

8 hours 15 min ago
As the new year progresses, many free and open source projects are turning their attention to various formalized mentoring programs, such as Mozilla's Winter of Security, Outreachy, and (the program with my favorite name) the X.Org Endless Vacation of more

TuxMachines: Wine Staging Release 2.2

8 hours 20 min ago
  • [Wine Staging] Release 2.2

    Since the last release, we tested various games with the CSMT (command stream multithreading) feature enabled to identify remaining bugs and possible ways to improve performance. As a result, this release includes various speed optimizations, especially for DX10/11 games. Some functions, for example updating subresources, which previously required synchronization with the command stream thread, can now be done asynchronously. There might still be differences compared to Wine Staging 2.0, since some of the speed improvements from the original CSMT patchset contained bugs and have not been fixed / added back yet.

  • Wine-Staging 2.2 released with CSMT speed optimizations

    The Wine team has put out another Wine-Staging release based on Wine 2.2, this new development release has some CSMT speed optimizations.

    For those that don't know what CSMT is, it stands for "Commandstream multithreading" which should give you better performance in Wine.

  • Wine-Staging 2.2 Offers CSMT Speed Optimizations

    Wine-Staging 2.2 is now available as the latest version of Wine that carries various testing/experimental patches re-based atop the latest Wine bi-weekly development snapshot.

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Reddit: What is the state of LTO optimizations for the Linux Kernel?

8 hours 22 min ago

Year 2014 was the last time I heard anyone talking about it.

submitted by /u/linuksas
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TuxMachines: Virtual Reality on GNU/Linux

8 hours 23 min ago
  • Destinations & Dota VR Hub are now available on Linux

    Valve have already put up Linux versions of both Destinations and The Dota VR Hub now that SteamVR is supported on Linux in beta.

  • Valve debuts developer build of SteamVR for Linux

    Heads up, Linux fans who are maybe also VR developers (or vice versa): The folks at Valve Software have today released a very much still-in-development version of SteamVR that runs on Linux.

  • Valve launches SteamVR support for Linux

    Valve has been giving Steam users Linux love since 2012, and it's not stopping with VR. The company just launched SteamVR for Linux, letting developers create Linux content for the HTC Vive VR headset, trackers and other hardware. The program is in beta, meaning developers must use an NVIDIA developer beta driver that's built on "Vulkan," the successor to OpenGL. You're limited to "direct" mode, meaning you can only display images on the headset and not a desktop display at the same time.

  • Valve Finally Brings SteamVR To Linux As A Developer Release

    It was over four months ago now that Valve showed SteamVR running in Linux for the first time. Today, it’s finally launching the platform on the operating system, albeit in a limited form.

    SteamVR comes to Linux as a development release, meaning it’s intended for content creators to start working on apps for the open-source OS, and not for regular Linux users to access. To that end, users must have opted into the public Beta for Steam or SteamVR to access it along with obtaining pre-release drivers. On Nvidia cards that means the 375.27.10 “Developer Beta Driver”, while AMD users will need a pre-release version of the radv driver. You’ll also need Unity 5.6 to actually create content through Linux.

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Phoronix: Another Linux Kernel Vulnerability Leading To Local Root From Unprivileged Processes

8 hours 32 min ago
CVE-2017-6074 was made public today as a DCCP double-free vulnerability that could allow for kernel code execution from an unprivileged process... 5 Videos to Get You Pumped to Speak at MesosCon 2017

8 hours 38 min ago
Title: 5 Videos to Get You Pumped to Speak at MesosCon 2017 22 FebLearn more

Phoronix: The Vulkan Differences Between AMDGPU-PRO, RADV & SteamVR's RADV Drivers

8 hours 53 min ago
With Valve having published a binary-only RADV Radeon Vulkan driver build for their beta of SteamVR on Linux, I did some poking out of curiosity to see the differences to the mainline RADV driver in Mesa. Out of curiosity I also did a comparison to see how the Vulkan capabilities compare to the proprietary AMDGPU-PRO Vulkan driver...

TuxMachines: Android Leftovers

8 hours 54 min ago

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TuxMachines: LG Watch Sport review: Not the watch Android Wear needs right now

10 hours 20 min ago

The LG Watch Sport just looks and feels like a “gadget” and not a “watch.” It harkens back to the days of those old Microsoft Spot watches (remember those?). Instead of reaching as broad a market as possible with the first full-featured Android Wear 2.0 watch, LG and Google have given us something with almost impossibly narrow appeal. This watch is almost exclusively for large-wristed athletic types whose fashion sense leans toward calculator watches. I found myself wanting to put it on just before I left for the gym, and itching to take it off the moment I got home.

Android Wear 2.0 deserves a better showcase watch than this. With any luck, another manufacturer will step in with a more universally acceptable design that at least supports Android Pay and has a heart-rate monitor.

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More in Tux Machines

New OpenStack Ocata stabilizes popular open-source cloud

Usually, it would be another couple of months before the open-source OpenStack Foundation cloud released a new version of its cloud software. This time around the OpenStack community released the latest version, Ocata, on a one-time, shorter cycle. This release is focused on improving stability, scalability, and performance of the core compute and networking services. Read more

Radeon vs. NVIDIA Performance For HITMAN On Linux With 17 GPUs

Last week Feral Interactive released the much anticipated Linux port of HITMAN, which debuted for Windows last year. Now that there's benchmark support for HITMAN on Linux, I have been running a number of tests for this game that's powered by the Glacier Engine and making use of OpenGL for rendering on Linux. In this article are our initial AMD Radeon performance figures making use of the RadeonSI Gallium3D driver compared to NVIDIA's driver and the assortment of GeForce results published yesterday. Read more

How China Mobile Is Using Linux and Open Source

China Mobile is one of the biggest telecom companies in the world, with more than 800 million users in China -- all of whom are served with open source technologies. During the 2016 Mobile World Congress, China Mobile declared that the operational support system running their massive network would be based on open source software. China Mobile is not alone; many major networking vendors are moving to open source technologies. For example, AT&T is building their future network on top of OpenStack, and they have invested in software-defined technology so significantly that they now call themselves a software company. Read more

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