- Talk - lists.gtalug.org

Dragos CrashOverride -The Washington Post
by Russell 12 Jun '17

12 Jun '17

Latest electrical grid vulnurability report. Stuxnet type toggling (breakers this time) can cripple a grid. Washington Post article here. https://www.washingtonpost.com/world/national-security/russia-has-developed… -- Russell Sent by K-9 Mail

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Good introduction to Kibernetes
by Myles Braithwaite 09 Jun '17

09 Jun '17

<https://jvns.ca/blog/2017/06/04/learning-about-kubernetes/> I remember someone at a GTALUG meeting asking about Kubernetes (a new container thing). This is a really awesome introduction to what Kunernetes is and links to some good resources for more information.

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git - push and pull attached to different remotes?
by Giles Orr 05 Jun '17

05 Jun '17

This isn't strictly a Linux question, but this list is a great knowledge base and I know a lot of you use git. Usually on Linux. :-) I've written a Python program that checks all of your repositories to see if they're up-to-date with your remotes. But given the flexibility of git - and the output of 'git remote show origin' which shows separate URLs for "Fetch" and "Push" - it's occurred to me that it's probably NOT safe to assume that the Fetch and Push URLs are the same. But ... does anyone actually have different Fetch and Push URLs? Why would you do this? -- Giles https://www.gilesorr.com/ gilesorr(a)gmail.com

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Junior Linux Sysadmin Job
by Fernando Duran 02 Jun '17

02 Jun '17

Hello, I'm part of the Systems team at Kira Systems, a fast-growing Toronto-based AI software company. We are looking for a full-time Junior Linux SysAdmin/SRE to join our team. Our ideal candidate may have little or no professional experience but possesses initiative and intellectual curiosity, and the desire to learn from our team. http://kirasystems.com/careers#op-181321-junior-linux-sysadminsre This is my prehistoric (pre-google!) email lists account that I don't monitor often, please direct questions to fernando(a)kirasystems.com Cheers, Fernando Duran Senior Systems Administrator, Kira Systems

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Our team at kobo needs a sysadmin
by David Collier-Brown 02 Jun '17

02 Jun '17

We're dev-ops, so you need to be able to write scripts, especially ones like chef recipes to install things. --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb(a)spamcop.net | -- Mark Twain

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deal for Brother printer
by D. Hugh Redelmeier 25 May '17

25 May '17

Background: I have a Brother DCP7065DN: - laser printer, "duplex" (can print on both sides of paper) - scanner (flatbed + sheet feeder (single-sided)) - (wired) networking (or USB) It works pretty well BUT the printer is a "GDI" printer and thus requires proprietary drivers. Luckilly Brother supports Linux, but it is annoying having to install the drivers on each machine that will access the printer. The deal: <http://forums.redflagdeals.com/brother-ca-brother-ca-refurbished-b-w-laser-…> Brother sells refurbished units online at a good price - free shipping for purchases over $50 - good warranty even though refurbished - if you sign up for their newsletter, you get a 25% off coupon that works for refurbished items even though it is not supposed to. This disappears the end of June 1. Be careful, some of the printers on offer are GDI and some have PCL6 and PostScript emulation. You can find out from the "full feature list" for the printer. Look for "emulations". In my modest experience with older Brothers, using PCL6 is best since most of the hard rendering work would be done by the computer rather than the printer and my computers have more resources than a printer. I know, that would be an argument for GDI, but proprietary drivers are unfortunate. I just bought this one: <http://www.brother.ca/en-ca/MFC/5/ProductDetail/Refurbished/MFCL2720DW> I think that this was the best one still in stock. I expect that it will work with Linux. And it can FAX! It supports PCL and PostScript emulation so I hope that no proprietary driver will be needed for printing. Scanning will likely need a proprietary driver. PS: there are other refurbished things available on the Brother site: just plain printers, sewing machines, etc. <https://www.brother.ca/en-CA/Refurbished/>

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Device Firmware updates getting easier (Logitech users, heads up!)
by Scott Sullivan 25 May '17

25 May '17

http://fwupd.org Firmware Update Deamon. This wonderful utility/service creates a consistent means for hardware vendors to provided and apply firmware updates to devices. Dell is on board and now so is Logitech. The tools and infrastructure a written by the developer that created and released the ColorHug. The ColorHug is an open source color measurement device for monitor color calibration. He initial was fixing his own need to provided easy firmware updates to the ColorHug. fwupd came on my radar a few months ago, when there was news reporting about improved Thunderbolt 3 support for the Dell laptops, and fwupd was the delivery mechanism. But at the time I didn't have any Dell laptops, so it was just a curiosity. Now what I do have is a lot of Logitech K400 keyboards, and no easy means of updating the vulnerable firmware. fwupd now changes that. https://blogs.gnome.org/hughsie/2017/05/22/updating-logitech-hardware-on-li… My Experience ============= [scott@failfast ~]$ sudo dnf install fwupd # This got me version 0.7.5-1.fc25, which didn't quite work out of box. No matter, were upgrading anyways. [scott@failfast ~]$ fwupdmgr get-devices Error calling StartServiceByName for org.freedesktop.fwupd: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown return code 127 [scott@failfast ~]$ sudo dnf update fwupd --enablerepo=updates-testing Failed to synchronize cache for repo 'xvitaly-purple-skypeweb', disabling. Last metadata expiration check: 0:00:19 ago on Thu May 25 08:45:40 2017. Dependencies resolved. ==================================================================================================================== Package Arch Version Repository Size ==================================================================================================================== Upgrading: fwupd x86_64 0.9.2-2.fc25 updates-testing 256 k replacing libebitdo.x86_64 0.7.5-1.fc25 libdfu x86_64 0.9.2-2.fc25 updates-testing 88 k Transaction Summary ==================================================================================================================== Upgrade 2 Packages Total download size: 344 k Is this ok [y/N]: y Downloading Packages: (1/2): libdfu-0.9.2-2.fc25.x86_64.rpm 283 kB/s | 88 kB 00:00 (2/2): fwupd-0.9.2-2.fc25.x86_64.rpm 489 kB/s | 256 kB 00:00 -------------------------------------------------------------------------------------------------------------------- Total 438 kB/s | 344 kB 00:00 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Upgrading : libdfu-0.9.2-2.fc25.x86_64 1/5 Upgrading : fwupd-0.9.2-2.fc25.x86_64 2/5 Cleanup : fwupd-0.7.5-1.fc25.x86_64 3/5 Cleanup : libdfu-0.7.5-1.fc25.x86_64 4/5 Obsoleting : libebitdo-0.7.5-1.fc25.x86_64 5/5 Verifying : fwupd-0.9.2-2.fc25.x86_64 1/5 Verifying : libdfu-0.9.2-2.fc25.x86_64 2/5 Verifying : libdfu-0.7.5-1.fc25.x86_64 3/5 Verifying : fwupd-0.7.5-1.fc25.x86_64 4/5 Verifying : libebitdo-0.7.5-1.fc25.x86_64 5/5 Upgraded: fwupd.x86_64 0.9.2-2.fc25 libdfu.x86_64 0.9.2-2.fc25 Complete! # Let's follow the instructions on the blog post. [scott@failfast ~]$ sudo vi /etc/fwupd.conf [scott@failfast ~]$ sudo service restart fwupd [scott@failfast ~]$ fwupdmgr refresh [scott@failfast ~]$ fwupdmgr get-devices [ Redacted other Devices ] Unifying Receiver Guid: 77d843f7-682c-57e8-8e29-584f5b4f52a1 Guid: 9d131a0c-a606-580f-8eda-80587250b8d6 UniqueID: system/*/lvfs/firmware/com.logitech.Unifying.RQR12.firmware/* DeviceID: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2 Description: A Unifying receiver allows you to connect multiple compatible keyboards and mice to a laptop or desktop computer with a single USB receiver. Updating the firmware on your Unifying receiver improves performance, adds new features and fixes security issues. Plugin: unifying Flags: allow-online|supported DeviceVendor: Logitech Version: RQR12.01_B0019 VersionBootloader: BOT01.02_B0014 Created: 2017-05-25 AppstreamId: com.logitech.Unifying.RQR12.firmware Summary: Firmware for the Logitech Unifying receiver UpdateDescription: RQR12.07_B0029:This release addresses an unencrypted keystroke injection issue known as Bastille security issue #11. The vulnerability is complex to replicate and would require a hacker to be physically close to a target.RQR12.05_B0028:This release addresses an force pairing issue, an unencrypted keystroke injection issue and fake mouse issue known as Bastille security issues #1, #2 and #3. The vulnerabilities are complex to replicate and would require a hacker to be physically close to a target. UpdateVersion: RQR12.07_B0029 UpdateHash: d0d33e760ab6eeed6f11b9f9bd7e83820b29e970 UpdateChecksumKind: sha1 License: Proprietary UpdateUri: https://secure-lvfs.rhcloud.com/downloads/938fec082652c603a1cdafde7cd25d76b… UrlHomepage: http://support.logitech.com/en-us/software/unifying Vendor: Logitech Trusted: none [scott@failfast ~]$ fwupdmgr update Downloading RQR12.07_B0029 for Unifying Receiver... Failed to save file: Failed to rename file '/tmp/938fec082652c603a1cdafde7cd25d76baadc70d-Logitech-Unifying-RQR12.07_B0029.cab.RKFS0Y' to '/tmp/938fec082652c603a1cdafde7cd25d76baadc70d-Logitech-Unifying-RQR12.07_B0029.cab': g_rename() failed: Operation not permitted [scott@failfast ~]$ sudo fwupdmgr update Downloading RQR12.07_B0029 for Unifying Receiver... Updating RQR12.07_B0029 on Unifying Receiver... Restarting device… [****************************************] USB error on device 046d:aaaa : No such device (it may have been disconnected) [-4] # at this point removing and reconnecting the USB dongle didn't show it as updated, but this turned to just require a restart of fwupd. [scott@failfast ~]$ sudo systemctl restart fwupd [scott@failfast ~]$ fwupdmgr get-devices Unifying Receiver Guid: 77d843f7-682c-57e8-8e29-584f5b4f52a1 Guid: 9d131a0c-a606-580f-8eda-80587250b8d6 DeviceID: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3.3/1-3.3.2 Plugin: unifying Flags: allow-online|supported DeviceVendor: Logitech Version: RQR12.07_B0029 VersionBootloader: BOT01.02_B0014 Created: 2017-05-25 -- Scott Sullivan

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USB 3.0 - Hubs RMA EOL Notice 96
by Russell Reiter 19 May '17

19 May '17

Re: The linux kernel XHCI compliancy early adoption. End of Life for USB 3.0 Hubs Mandate: Required Effective Date: January, 2017 Vendors that develop USB 3.0 Hubs will be able to certify these hubs until Jan 1, 2017. These hubs shall be clearly marked as USB 3.0 SuperSpeed Hubs. http://compliance.usb.org/index.asp?UpdateFile=USB3#96 For the kernel writing person who was kind enough to correct me off list regarding my unix glue issues while sorting out bulk endpoints. I call this my first Potterling hack. It's a tool button which I add for new users. I use it to quick mute my soundcard. It was not my first TCL/TK or GLADE GUI radio button definition, but it was my favorite. ;-) I still use it. amixer sset Master toggle I have named it a "Potterling hack" because, in some spins, not so long ago, Pulseaudio hooked into alsa but did not unmute the hardware. This caused no end of confusion when the GUI showed mute or unmute but nothing happened to the users sound. Shhh, please don't tell Lennart Potterling, I don't want him to know I often jest while having fun with linux.

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IRC for the 21st century: Introducing Riot
by Justin W. Flory 19 May '17

19 May '17

Hello everyone, I wanted to share a helpful resource with the community about a great way to use IRC. For anyone familiar with IRC, we know its strengths and also its weaknesses, especially for people who are just getting involved with open source for the first time. Over the past year, a new protocol called Matrix has been developed with a front-end client called Riot. It integrates easily with various IRC networks, offering a bouncer-like service and a friendly, easy-to-use interface for various platforms. You can check out more about Riot and see how to use it in the following article on Opensource.com: https://opensource.com/article/17/5/introducing-riot-IRC Hope some people find this useful! Thought I would share it. :) Even if you're already using your own IRC setup, the work going on with Matrix / Riot is still cool to read about. :) Feel free to share this with anyone who might find it useful too. -- Cheers, Justin W. Flory jflory7(a)gmail.com

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For the curious, a ZFS checksum error!
by Scott Sullivan 19 May '17

19 May '17

The Nice thing about ZFS, is it'll tell you exactly which file is borked. You won't get that out of traditional raid/file-system pair, because the two don't know about each other. At best you'll get a notice that block @ meaningless number is bad. [root@muse ~]# zpool status -v pool: muse state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: http://zfsonlinux.org/msg/ZFS-8000-8A scan: scrub in progress since Thu May 18 23:46:04 2017 3.48T scanned out of 3.90T at 417M/s, 0h17m to go 0 repaired, 89.25% done config: NAME STATE READ WRITE CKSUM muse ONLINE 0 0 2 raidz2-0 ONLINE 0 0 4 ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N4TZU5LS ONLINE 0 0 0 ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N5AHPHK8 ONLINE 0 0 0 ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1VJKLZ5 ONLINE 0 0 0 ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N4TZURA5 ONLINE 0 0 0 ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N3YP9AJL ONLINE 0 0 0 spares ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N3YP95XE AVAIL errors: Permanent errors have been detected in the following files: /data01/backups/1x.jarvis.revident.ca/libvirt/images/vs130.revident.ca.img muse/backups/1x.jarvis.revident.ca@20170423_193849-0400:/libvirt/images/vs130.revident.ca.img This is bit rot in action. -- Scott Sullivan

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