- Talk - lists.gtalug.org

Actual ttyS0 MIA
by Stewart C. Russell 11 May '20

11 May '20

On my desktop (i7-4790K, 32 GB DDR3, Asus H97M-E) I've run out of serial ports I can usefully access via USB serial adapters*. The motherboard does have a real COM port on it, though, and just after I built the system I added an adapter cable/bracket (one of these, IIRC: https://www.canadacomputers.com/product_info.php?cPath=5_1336_1449&item_id=…) But it's never worked as a port, and I want to make it work. It's enabled in the BIOS and Linux (Ubuntu 19.10) finds it: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A I'm a member of `dialout`, and the ports seem to check out: $ ls -l /dev/ttyS0 /dev/ttyUSB0 crw-rw---- 1 root dialout 4, 64 May 6 21:54 /dev/ttyS0 crw-rw----+ 1 root dialout 188, 0 May 3 07:50 /dev/ttyUSB0 No data goes in or out. Curiously `stty -F /dev/ttyS0` hangs for a few seconds, but that's the only odd thing I see. Hardware serial ports are kind of ancient history. Anyone remember ancient magic to make 'em work? There's a chance that ASUS don't use the standard serial pin header assignment: I'll trace that if necessary. thanks, Stewart *: you run out of ways to identify the interfaces via /dev/serial/*. Unless I reinvested a fortune in real FTDI adapters with unique serial numbers, I'm kind of stuck. I currently use: 1 real FTDI, 1 knock-off FTDI, a QinHeng HL-340, a Prolific PL2303 and a Silicon Labs CP210. I have another knock-off FTDI and another Prolific, but they identify identically and make device selection problematic.

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Cheesiest way of backing up?
by Gron Arthur 11 May '20

11 May '20

I'd have to move to the recent release of Debian to get Duplicity to work. So I've passed on this option. I can't mount the backup I've created with restic, not sure why. So, I've also passed on this option. Now I'm just going to compress and password protect with 7z, and upload to Backblaze. It's mostly personal files, like pictures, that can be easily archived. How cheesy is this?

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Re: [GTALUG] Free Linux VMs
by Howard Gibson 11 May '20

11 May '20

On Sun, 10 May 2020 12:06:20 +0200 ac via talk <talk(a)gtalug.org> wrote: > in my opinion, avoid any ongoing "free" services, more so if it is a > huge multinational doing the offering as the huge companies all have > some sort of "dominate the planet" and kill off all competition type > long term goal... ac, How legal do you think it is for a free online database to mine your data? I would regard this as a thread. -- Howard Gibson hgibson(a)eol.ca jhowardgibson(a)gmail.com http://home.eol.ca/~hgibson

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Re: [GTALUG] Free Linux VMs
by Alvin Starr 10 May '20

10 May '20

On 5/10/20 1:38 PM, ac wrote: > On Sun, 10 May 2020 13:09:47 -0400 > Alvin Starr via talk <talk(a)gtalug.org> wrote: >> Think of it like the thief who tries to steal your old >> rear-projection television and gives himself a hernia. >> Then suing you for his medical expenses and loss of revenue. >> > roflmao, you are sooooo FUNNY! As my mother use to say. No sense getting old if your not getting cute. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 alvin(a)netvel.net ||

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Free Linux VMs
by Ansar Mohammed 10 May '20

10 May '20

So just an update to my earlier email, you can get 2 free Linux instances on Oracle's Cloud platform and 1 free instance on Google's Cloud platform. These are not time restricted. If you do take up the offer, I strongly suggest you leave ssh password auth disabled and use a key. These systems get millions of password spray attacks every day over ssh.

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AMD releases 3100 and 3300x
by Nicholas Krause 09 May '20

09 May '20

Seems AMD is launching around low end processor line: https://www.guru3d.com/articles-pages/amd-ryzen-3-3100-and-3300x-review,1.h… Its 120 dollars US for 4 cores/8 threads. According to my research seems to be equal to a i7700K and those go used for around 300 US. May be a interesting option for a budget system if your workloads aren't thread heavy. Seems Intel was really just sitting around after Sandy Bridge for the most part, Nick -- Fundamentally an organism has conscious mental states if and only if there is something that it is like to be that organism--something it is like for the organism. - Thomas Nagel

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(off topic) Backup/restore of text messages on Android phone
by William Park 07 May '20

07 May '20

Hi all, My LG Nexus 5X died. It went into "boot loop" for a while, and now it won't even charge. It's dead. So, I'm borrowing old Samsung Galaxy S3. It recovered all data (those I care about), except text messages. I lost all my Google Messages data, which included personal text conversations as well as notices from banks, credit card, and sorts. When I go back to my own phone again, I'm going to lose current SMS text messages again. How do I prevent this? How do I backup/restore text messages. -- William Park <opengeometry(a)yahoo.ca>

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On the subject of backups.
by Alvin Starr 06 May '20

06 May '20

I am hoping someone has seen this kind of problem before and knows of a solution. I have a client who has file systems filled with lots of small files on the orders of hundreds of millions of files. Running something like a find on filesystem takes the better part of a week so any kind of directory walking backup tool will take even longer to run. The actual data-size for 100M files is on the order of 15TB so there is a lot of data to backup but the data only increases on the order of tens to hundreds of MB a day. Even things like xfsdump take a long time. For example I tried xfsdump on a 50M file set and it took over 2 days to complete. The only thing that seems to be workable is Veeam. It will run an incremental volume snapshot in a few hours a night but I dislike adding proprietary kernel modules into the systems. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 alvin(a)netvel.net ||

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Re: [GTALUG] On the subject of backups.
by lsorense＠csclub.uwaterloo.ca 06 May '20

06 May '20

On Mon, May 04, 2020 at 04:38:28PM +0200, ac via talk wrote: > Hi Alvin, > > On a 2TB dataset, with +-600k files, I have piped tree to less with > limited joy, it took a few hours and at least I could search for > what I was looking for... - 15TB and 100M is another animal though > and as disk i/o will be your bottleneck, anything will take long, no? > > now, for my own info/interest, can you tell me which fs is used for this > ext3? Hmm, sounds awful slow. Just for fun I ran find on one of my drives: # time find /data | wc -l 1825463 real 3m57s.208s That is with 5.3T used out of 6.0TB. Running it a second time when it is cached takes 7.7s. Tree takes 14.7s. Another volume: # time find /mythdata | wc -l 54972 real 0m1.924s That is with 15 TB out of 15 TB in use (yes that one always fills up for some reason). Both of those are lvm volumes with ext4 on top of software raid6 using 5400rpm WD red drives. Seems either XFS is unbelievable bad, or there isn't enough ram to cache the filesystem metadata if you are having a problem with 100M files. I only have a measly 32GB in my home machine. -- Len Sorensen

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BSDCan session on "homelabs" tomorrow (May 5)
by Christopher Browne 05 May '20

05 May '20

The "homelabs" concept is about having your own lab infrastructure, well, at home :-) https://www.reddit.com/r/homelab/ The Reddit "wiki" https://www.reddit.com/r/homelab/wiki/index has a lot of interesting material on this... (From twitter) Reminder: The live recording of my @BSDCan <https://twitter.com/BSDCan> Panel on Homelabs is tomorrow at 2pm Eastern (18:00 UTC) https:// live.freebsd.org/BSDCan/homelab/ <https://t.co/I4KjyaP0pF?amp=1> Please join the chatroom and ask your questions. They'll certainly have a BSD-flavoured conversation, so it wouldn't do to be a jerk and try to refocus on Linux, but I'm sure lots of what is discussed by the panel will involve things like hardware and software choices that aren't the OS. -- When confronted by a difficult problem, solve it by reducing it to the question, "How would the Lone Ranger handle this?"

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