- Talk - lists.gtalug.org

Dell servers for cheap
by Stewart C. Russell 09 Apr '19

09 Apr '19

via Seneca: Please email Lev Piaseckyj at lev(a)masterfile.com to arrange pickup or with questions. == Dell PowerEdge 2950 servers - quantity available: 22 units - some with 2x dual core processors, others with 1x dual core processor - 4GB RAM (8x512MB; only a few have more RAM) - some have PERC RAID controllers - rack mounting rails included - a few fibre channel HBAs may be available - limited quantity of sleds for Serial Attached SCSI (SAS) drives are available - specs: https://www.dell.com/downloads/global/products/pedge/en/2950_specs.pdf Dell PowerEdge 2950 server with ONE dual core processor - $80 each Dell PowerEdge 2950 server with TWO dual core processors - $100 each SAS Hard Drives for PE2950 - 73GB 15k Serial Attached SCSI (SAS) drives - quantity available: 29 units - $20 each wiped (to recover cost of wiping) == Also available: - many older Dell servers: PE2850, PE2750, PE2650, PE1750 with rails - many 19” Dell LCD monitors (models 1908FP, 1907FP, 1905FP) and a few 21" - APC AP7960 Switched Rack PDUs (Power Distribution Units) https://toronto.craigslist.org/tor/ele/d/north-york-apc-ap7960-switched-rac… - McDATA Sphereon 4500 Fabric Switch (fibre channel) https://toronto.craigslist.org/tor/sop/d/north-york-mcdata-sphereon-4500-fa… - 3com SuperStack 4500 50-port ethernet switches https://toronto.craigslist.org/tor/sop/d/north-york-3com-superstack-port/68… - Dell 4210 Server Rack Enclosure, 19” x 42U https://toronto.craigslist.org/tor/sys/d/north-york-dell-4210-server-rack/6… - Dell ML6000 tape library with 2 expansion modules - Dell ML6000 tape library with 1 expansion module - Dell PowerVault 136T tape library - older Cisco ethernet switches, Catalyst 2950, 2960, 3550, 3560 - older 3com 4400 series ethernet switches - older Belkin KVMs - old small Wacom tablets - many computer speakers - many power cables, ethernet cables, power bars Everything would have to be picked up at Masterfile offices, near Eglinton & Wynford Drive. Please email Lev Piaseckyj at lev(a)masterfile.com to arrange pickup or with questions.

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war story: fixing a doc bug can be easy
by D. Hugh Redelmeier 08 Apr '19

08 Apr '19

I was reading some of the documentation of dnf. I also built the dnf package on Fedora 29. In the process, I found (1) a spelling error (2) three error messages pointing at problems with the .rst files It wasn't too hard to figure out what the fixes should be. Since the source is on github, I could just edit the files and make a push request. These three commits were accepted a couple of days later. <https://github.com/rpm-software-management/dnf/commit/9b49b06a6db314a74e904…> <https://github.com/rpm-software-management/dnf/commit/457b5fee28a22af991ce9…> <https://github.com/rpm-software-management/dnf/commit/1b50c40d8cff339d76d09…>

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Help with choosing a WiFi router
by David Mason 01 Apr '19

01 Apr '19

We’ve had a DLINK DIR-628 for quite a while. When it works it has been great, but it drops out several times a day. Sometimes it come back fairly seamlessly, but sometimes you have to turn off the wifi on connected devices and turn it back on again. Power-cycling it always resolves the problem, but it’s annoying. So I guess I’m in the market for a new WiFi router. A little bit of additional range would be great, and if there’s more speed available, so much the better, but as I said, when it’s working, it’s been great. It’s not uncommon for 3 video streams being viewed while I’m ssh’ed into remote systems, or downloading files, or cloning repositories, and it all works fine. Price isn’t a major concern… I’d happily pay for reliability and performance. To the degree it matters, we’re mostly connected from Apple devices (except for the gateway and RAID servers - both of which are Debian - which are wired together). Thanks for any advice! ../Dave

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VM Virtualbox Linux
by R360 Design INC 01 Apr '19

01 Apr '19

Hello everyone, I have a VM virtualbox set up running CentOS Linux. The host OS is Windows 10. I then attempted to set up two-way network communication between the CentOS Guest and my Windows host. Has anyone attempted this and succeeded? I thought it would be straightforward but setting up the NAT adapter, and installing "VM Guest Addition" got me lost. Ultimately, I 'd like to have a Apache server running on my Centos Linux VM, and then access it using a client browser on my host machine. Regards, Jonathan

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Thanks for Who Mentioned the Markham Research Lab at IBM
by nick 31 Mar '19

31 Mar '19

Greetings All, I don't recall who mentioned the research lab in Markham but after going indirectly through HR they are trying to find work for me on their compiler or toolchain team up there at entry level. Thanks, NIck

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reverse engineering
by D. Hugh Redelmeier 30 Mar '19

30 Mar '19

Sometimes I get annoyed at binaries for which I don't have any code. Stepping back a bit, I get annoyed at undocumented hardware for which the only drivers are closed-source, or even worse, Windows-only or Android-only. One way to pry these open is through reverse engineering tools What prompts this message is that the NSA has just released Ghindra as open source. <https://www.nsa.gov/resources/everyone/ghidra/> (This would be perfect code for the NSA to plant a trojan horse in.) Previously (and maybe still) the tool that seemed to be most popular was IDA, a commercial product that runs on Windows. There are some other choices: <https://reverseengineering.stackexchange.com/questions/1817/is-there-any-di…> ==== War story (feel free to ignore): ==== I put some effort into this in the early 1980s. I wrote my own disassembler that made some inferences from control flow. I disassembled two non-trivial bits of code: - the undocumented monitor that resided in my Altair's "Bytesaver" (EPROM reader and writer). The software was originally written for the Processsor Tech Sol 20 machine. - the proprietary but buggy firmware in my Volker-Craig VC2100 terminal (meant to compete with the VT100) These were a lot of work and they were only 1k and 16k bytes respectively. My reversing was complete: I ended up with useful source for both. With information gained from the PT monitor, I was able to write my own, much more ambitious monitor. I found bugs and identified fixes for the VC2100 and reported them to the author of the code at Volker-Craig. But the product was cancelled before the fixes were released. I gave up on one reverse engineering task. I bought a copy of MuMath, a symbolic algebra package, that was for the Osborne I. I tried to run it on my Kaypro II. It seemed that there was some tricky copy-protection code involving bank-switching. I never cracked that puzzle. ==== End of war story ==== I would love to see better reverse engineering for a few things. - my Lenovo Yoga notebook gets a machine whenever it goes to sleep and back. Sleep/awake still works, but the machine checks probably slow things down and they make me unhappy. - nvidia video cards are not well-enough supported by nouveau. nvidia has not disclosed enough about the hardware to fix this. - Many GPUs used with ARM are not supported with open-source Linux drivers. There are a number of reverse engineering projects but progress isn't fast enough for me. My guess is that these projects are too hard since the size of object code to be analyzed is several orders of magnitude more than what I've tried.

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[GTALUG-Announce] GTALUG Meeting April 9th at 7:30pm
by hi＠gtalug.org 28 Mar '19

28 Mar '19

<https://gtalug.org/meeting/2019-04/> # Linux Unhatched Learning Circles at Toronto Public Library with Larysa Essex Toronto Public Library has adopted the learning circle model to deliver tech-based programs. This talk will illustrate how the model was used to deliver an online Linux course in a non-traditional classroom setting. ## Location George Vari Engineering and Computing Centre 245 Church Street, Room 203 Ryerson University <https://goo.gl/maps/16oJ2> <https://www.openstreetmap.org/way/23447525> ## Schedule * 6:00 pm - Please discuss on the general mailing list (i.e. <talk(a)gtalug.org>) where you want to go for dinner. * 7:30 pm - Meeting and presentation. * 9:00 pm - After each meeting, a group of GTALUGers move to The Imperial Pub (54 Dundas St East) for refreshments and more socialising. # Code of Conduct We want a productive happy community that can welcome new ideas, improve every process every year, and foster collaboration between individuals with differing needs, interests and skills. We gain strength from diversity, and actively seek participation from those who enhance it. This code of conduct exists to ensure that diverse groups collaborate to mutual advantage and enjoyment. We will challenge prejudice that could jeopardise the participation of any person in the community. The Code of Conduct governs how we behave in public or in private whenever the Linux community will be judged by our actions. We expect it to be honoured by everyone who represents the community officially or informally, claims affiliation or participates directly. It applies to activities online or offline. We invite anybody to participate. Our community is open. Please read more about the GTALUG Code of Conduct here: <https://gtalug.org/about/code-of-conduct/>. If you have any questions, comments, or concerns about the GTALUG Code of Conduct please contact the GTALUG Board @ <board(a)gtalug.org>. --- GTALUG Announce mailing list announce(a)gtalug.org https://gtalug.org/mailman/listinfo/announce

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March 2019 meeting video
by Alex Volkov 28 Mar '19

28 Mar '19

Hey Everyone, March 2019 meeting video -- FPGAs for Fun, Acceleration, and Profit! with Chris Tyler Is here: Main talk -- https://youtu.be/VAdO16ER-GE Q&A -- https://youtu.be/aUsF1C-6w8Y Alex.

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[GTALUG-Announce] In The Community
by hi＠gtalug.org 26 Mar '19

26 Mar '19

# In The Community # March ## Toronto AWS User Group AWS Storage Options and their anti-patterns * Wednesday, 27th, 6:00 PM * Myplanet, 252 Adelaide St. E * https://www.meetup.com/Toronto-AWS-Users-United/events/258967292/ ## Toronto Perl Mongers * Thursday, 28th, 7:00 PM * FlightNetwork, 145 King St West Suite 1400 * https://www.meetup.com/Toronto-Perl-Mongers/events/rhsxwpyzfblc/ # April ## Polyhack Toronto * Wednesday, 3rd, 6:30 PM * H Bar, 859 Queen Street W * https://www.meetup.com/polyhackTO/events/259646709/ ## Unix Unanimous * Wednesday, 10th, 6:45 PM * Ryerson, 245 Church St. [George Vari Engineering Building], ENG201 * http://www.unixunanimous.org/ ## Serverless Toronto * Thursday, 18th, 6:00 PM * Myplanet, 252 Adelaide St E * https://www.meetup.com/Serverless-Toronto/events/259565019/ ## Achievers Tech Talks Keeping up with React: What's new in version 16 * Thursday, 25th, 6:00 PM * 190 Liberty St. * https://www.meetup.com/achieverstech/events/260063740/ *** If you have an event to add to this monthly list, please contact: scott [at] gtalug [dot] org. --- GTALUG Announce mailing list announce(a)gtalug.org https://gtalug.org/mailman/listinfo/announce

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Local source for weird RAM
by Mike Kallies 21 Mar '19

21 Mar '19

Hello GTALUG, I have an HP ML110 G6 which I'm using for some minor virtualization, but it has 12G of RAM in it. I've been looking how to bring it up to 32G, but the options have been risky and expensive. So much so, that replacing it with a different machine seems more worthwhile. Does anyone know a local source for these 8G "Dual Ranked, ECC, Unbuffered/NON-REGISTERED" modules? https://trainingrevolution.wordpress.com/2014/01/05/hp-proliant-ml110-g6-se… Or should I give up and buy a new machine? -- Mike Kallies mike(a)kallies.ca

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