September 2015 - luv-main

Kernel 3.17 no longer allows bonding ppp devices
by Toby Corkindale 18 Nov '15

18 Nov '15

Hi, I hit a problem when attempting to upgrade to kernel 3.17.2 on a particular server. Some time between 3.13 and 3.17, the bonding driver has stopped accepting ppp devices, instead throwing an error that the MAC address cannot be changed. (And does not allow this to be forced) I suspect it's unlikely.. but has anyone here encountered this issue and found a solution? Alternatively.. do you know where the right place to file bug report about this would be? It's been a while since I've filed anything against the linux kernel itself. Cheers, Toby

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Networking Presentation @ Main Meeting
by Fraser McGlinn 07 Oct '15

07 Oct '15

Hi Guys, So i've approached the committee to run a networking presentation of some form. However before I begin planning for this, i'd like understand what knowledge is lacking out there in the group. As i'm sure you can imagine, there are a lot of parts to networking. My background so you can see if anything here interests you - I have a good ISP background, in which I have worked on networks both small and large. Through this I have a good knowledge of DSL based services and GPON (This is what NBN runs on). Broadband and PPP Services inc PPPoE and PPPoL2TP I also have a good knowledge of routing protocols such as IS-IS and BGP, and MPLS. Obviously throughout this I have general networking knowledge such as, subnetting, network design, troubleshooting, Quality of Service etc. Now the point of this email is that I want to understand what you want. Below are some ideas that I have for topics, but feel free to comment or add any that you would like. - Networking 101 - Fundamentals including subnetting, OSI Model, packet analysis and troubleshooting - Networking in the home. Internal networking, ADSL networking - Quality of Service - Packet marking, shaping and queuing Let me know your thoughts, Cheers, Fraser

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Re: Android connection
by Wayne Moulden 04 Oct '15

04 Oct '15

On 30/09/2015 10:45 PM, "Lev Lafayette" <lev(a)levlafayette.com> wrote: > > On Wed, September 30, 2015 10:58 pm, Lev Lafayette wrote: > > > > I have created the file ~/.android/adb_usb.ini with the following: > > > > > > 0x<2207> > > I mean of course > > 0x2207 > > .. just in case there's any confusion. :) > > > -- > Lev Lafayette, BA (Hons), GradCertTerAdEd (Murdoch), GradCertPM, MBA (Tech > Mngmnt) (Chifley) > mobile: 0432 255 208 > RFC 1855 Netiquette Guidelines > http://www.ietf.org/rfc/rfc1855.txt > > _______________________________________________ > luv-main mailing list > luv-main(a)luv.asn.au > http://lists.luv.asn.au/listinfo/luv-main It _should_ be a permissions problem, I had the same issue sometime ago and I had to add my user to the plugdev group then restart adb Wayne

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Android connection
by Lev Lafayette 30 Sep '15

30 Sep '15

Hi LUVers, I'm trying do a wee bit of Android work (hey, it has a Linux kernel) and have an Aldi Bauhn AT101-014 [1] and have the latest SDK installed and updated (./android update sdk --no-ui). I have the device connected via USB with developer mode, USB debugging mode on, and a MTP connection [2] and have mtpfs installed. I am using Debian Mint as the development system. I understand that I have to modify /etc/udev/rules.d/51-android.rules and possibly ~/.android/adb_usb.ini to include the vendor ID. This can be determined from running lsusb as follows: lev@owl ~/src/android-sdk-linux/tools $ lsusb Bus 004 Device 079: ID 2207:0011 (snip. The above is the relevant device; informative isn't it?) I have created the file /etc/udev/rules.d/51-android.rules with the following: SUBSYSTEM=="usb", ATTR{idVendor}=="2207", MODE="0666", GROUP="plugdev" I have created the file ~/.android/adb_usb.ini with the following: 0x<2207> All of which I believe is in accord to what should be done. However when I run owl tools # adb start-server owl tools # adb devices List of devices attached owl tools # I would expecting some connectivity at this point. [1] http://www.bauhn.com.au/_literature_140385/AT101-014_-_Instruction_Manual [2] http://developer.android.com/tools/device.html Thanks in advance, -- Lev Lafayette, BA (Hons), GradCertTerAdEd (Murdoch), GradCertPM, MBA (Tech Mngmnt) (Chifley) mobile: 0432 255 208 RFC 1855 Netiquette Guidelines http://www.ietf.org/rfc/rfc1855.txt

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Upgrading an OpenWRT router
by Jason White 26 Sep '15

26 Sep '15

I have a Linksys WRT1900AC router (the version 1 hardware), currently running OpenWRT 15.05-rc3. Now that the final release has been made, I'm contemplating an upgrade. According to the OpenWRT wiki, I'm supposed to download an image with a file name ending in "sysupgrade.img" rather than "factory.img". However, I can't find such a file on their download site. The best I can find (again via the wiki) is https://downloads.openwrt.org/chaos_calmer/15.05/mvebu/generic/openwrt-15.0… Suggestions on how to perform a safe upgrade would be welcome. As with any piece of networking hardware, the desire is to minimize risk.

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Job opening @ Open Query Pty Ltd (for AU/NZ based sysadmin/db engineer)
by Arjen Lentz 24 Sep '15

24 Sep '15

Hi all Job opportunity! Are you based in AU/NZ, ace at sysadmin & good with MySQL/MariaDB ? We'd like to talk with you! http://openquery.com.au/company/jobs/mariadb-engineer Regards, Arjen. -- Arjen Lentz, Exec.Director @ Open Query (http://openquery.com.au) Your databases and online infrastructure. Managed. Follow us http://openquery.com.au/blog/ & http://twitter.com/openquery

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ALSA auto-muting digital output
by Toby Corkindale 24 Sep '15

24 Sep '15

On my (headless) Linux box at home, I have a soundcard with digital out (optical), going straight to my amp. I can use various music-playing servers to let me select the music to play remotely, with the output emitting from the server. However for reasons that completely elude me, the ALSA system auto-mutes the output at the end of every song. It's infuriating. ALSA does indeed have an "auto-mute" setting, but I have ensured it is set to off. I wondered if the issue was with PulseAudio for a long time, but the problem still occurs after reconfiguring things to go direct to ALSA. As a work-around, I could modify the open-source software I'm using, to get it to run an unmute command after starting to play a track, but that's ridiculous. Surely there's a way to just stop it auto-muting on close? I don't suppose anyone else has ever encountered this, or found a solution? Toby

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btrfs replace with bigger disk
by James Harper 23 Sep '15

23 Sep '15

I am replacing a set of 4 x 3TB disks with 4 x 6TB disks in a server that holds backups. I did btrfs replace on one disk, and that has completed but is still showing the original size: Total devices 4 FS bytes used 5.21TiB devid 1 size 2.73TiB used 2.73TiB path /dev/sda3 devid 2 size 2.73TiB used 2.73TiB path /dev/sdb3 devid 3 size 2.73TiB used 2.73TiB path /dev/sdc3 devid 4 size 2.73TiB used 2.73TiB path /dev/sde3 /dev/sde3 replaced /dev/sdd3, and the partition itself is definitely the correct size: major minor #blocks name 8 19 2929216967 sdb3 8 67 5859472967 sde3 8 51 2929216967 sdd3 8 35 2929216967 sdc3 8 3 2929216967 sda3 I've tried running a btrfs resize but it hasn't changed anything. Google just keeps giving me the same pages telling me about how replace works and why btrfs is awesome, but nothing that will actually fix the problem so far... Does anyone know how I might fix this? Thanks James

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SELinux and dedicated disks
by Peter Ross 23 Sep '15

23 Sep '15

Hi all, one of my "lingering issues" since I am back working in Linuxland (especially CentOS): I have the "habit" to have dedicated virtual disks (or similar) for data, e.g. /var/lib/mysql (so I can snapshot them separately, clone and move between VMs etc.) But that makes SELinux unhappy. I was surprised, actually.. What do I have to add to the SELinux contexts to allow this to happen? Regards Peter

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Network file system for "exclusive use" by one client only
by Peter Ross 22 Sep '15

22 Sep '15

Hi, I am looking for a "slimmer" NFS when I have a file server with a lkot of space - while clients with not much. I would like to export parts of the server file systems but do not need to share them between the clients. So I don't need all the overhead of leases that expire, server-side locking etc. Instead it would be good enough to do locking on the client side and write a journal which can be send to the file server. The file server needs to provide read access to files and be able to write what's given to it from the client. UIDs etc. could be send through, the permission check would happen at the client side. I guess that's all needed and would be faster and less complex than NFS. Does this kind of network file system exist? Any other ideas for very fast access on file system level over the net welcome. Regards Peter

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