- luv-main - example.com

Scanner success, or so far
by Mark Trickett 18 Jul '20

18 Jul '20

Hello All, I have managed to do a scan with scanimage from the command line, this was what worked for me. <quote> I experience the same problem with 1.0.27-3.2. Inspecting the udev rules, I found that the file 60-libsane.rules is missing a line to apply permissions to the device if it has been recognized. Such a line is present towards the file’s end in older versions: ENV{libsane_matched}=="yes", RUN+="/bin/setfacl -m g:scanner:rw $env{DEVNAME}" Putting this line into a file /etc/udev/rules.d/65-libsane.rules allows scanners to be recognized normally after a reboot. -Juergen <endquote> I copied the line and put it in the correct file, owned by root, and group of root, and it is working. There are no other files in /etc/udev/rules.d/ where I was expecting to find some. I then unplugged the scanner, and plugged it back in. This is the LIDE 210, and tomorrow I will try the LIDE 120 that the earlier backends for sane would not support. Regards, Mark Trickett

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Scanner works, and does not
by Mark Trickett 18 Jul '20

18 Jul '20

Hello All, An "interesting" scanner issue. I have been reading up on Debian bug reports, and there is similarities, but also differences. I am using Debian Buster, I think it is up to date, I can scan with Simple Scan, but not with scanimage from the command line. I have found the scanner with lsusb, the permissions look right, and looking at other bits, I cannot see any obvious fault. I have not had to add myself to the scanner group in the past, and it appears that may not fix the issue from reading. I would appreciate comments and suggestions. Regards, Mark Trickett

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Resizing the whole screen with Debian 10 and Wayland
by Mark Trickett 18 Jul '20

18 Jul '20

Hello all, I am having a few problems with Debian 10 (Buster) 64 bit, the image, even during the boot sequence, more than fills the screen. I loose some of the text off the left edge of the screen, and more all round once up and running with Wayland, including the top bar. I also am having trouble resizing windows, currently Firefox is running maximised, but I want to reduce it a bit and I am having trouble getting any response. It is running on an AMD Ryzen 5 with 16 Gb of ram, and Gigabyte Nvidia Geforce GT 710 video card (NV106) driving a 24" LED Wintal 12V TV. While I can comprehend what Wayland is trying to do, and why, I am finding the discard of the older metaphors and way of working to be a serious "bug". They do have some excellent ideas, the top left corner hotspot is not intuitive, at least at first, and the new "menu" is not without merit, but such abandonment of prior ways of working is more than just irritating, it gets in the way of doing things. Regards, Mark Trickett

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KVM pc-i440fx-5.0 vs pc-q35-5.0
by Russell Coker 13 Jul '20

13 Jul '20

https://documentation.suse.com/sles/15-SP1/html/SLES-all/cha-libvirt-config… For KVM, QEMU, and some other AMD64 virtual machine systems that use QEMU code you have a choice of pc-i440fx-5.0 (default) and pc-q35-5.0 for the machine type. The command "kvm -L help" gives you a list of machine types. The above URL is the only one I could find mentioning the difference, it says that "q35 is an Intel* chipset and includes PCIe, supports up to 12 USB ports, and has support for SATA and IOMMU". https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-vir… I have the virtual IO drivers for storage (included in Linux by default and available for Windows at the above URL). I use the curses terminal for Linux VMs and am experimenting with VNC for Windows VMs so don't need USB keyboard and mouse. I don't need passthrough PCIe and the IOMMU only matters if you are running a hypervisor not for a guest. So would there be any benefit in using q35? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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S390X emulation
by Russell Coker 05 Jul '20

05 Jul '20

https://etbe.coker.com.au/2020/07/05/debian-s390x-emulation/ I just wrote a blog post about how to setup S390X emulation on Debian, a virtual mainframe running Linux. I have a play machine you can login to if you want to login to a virtual S390. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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PCI Ethernet cards for free
by Russell Coker 01 Jul '20

01 Jul '20

I have some 2 port PCI 100BaseT cards. These are sometimes really useful (and were expensive), but most machines only have PCIe nowadays. Email me off-list if you want some. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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hardware trends and hardware library
by Russell Coker 29 Jun '20

29 Jun '20

https://etbe.coker.com.au/2020/06/19/storage-trends/ I wrote the above blog post about trends in consumer level storage. Basically SSDs are getting so cheap that for large portions of the market spinning media makes no sense. If you need less than 2TB of storage in a workstation or server then SSD or NVMe is probably the best choice. The cheapest SSDs are significantly cheaper than the cheapest hard drives. I'm sending all my spare hard drives that are less than 500G in size to e- waste. I'll keep some 500G disks in the hardware library but anything smaller doesn't seem worth using. Also I'm going to send to e-waste all hardware that's designed for 32bit Intel systems. While a P3 made a decent firewall system, the cheap SATA SSDs make 64bit systems comparable for power use so I don't think a P3 is any good for a firewall nowadays. If anyone wants to make any last minute requests for IDE disks etc let me know. Finally while we aren't having LUV meetings you can still get access to the hardware library. Email me off-list if there's stuff you need, I can leave it on my porch or drop it off to you if you live in an area that's near somewhere I visit. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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PowerPC 64el QEMU problem
by Russell Coker 28 Jun '20

28 Jun '20

I am trying to run a virtual PPC64 system via QEMU on a Debian/Unstable AMD64 host. I have already got a s390x VM going (ssh root(a)s390x.coker.com.au password "SELINUX"). qemu-system-ppc64 -drive format=raw,file=/vmstore/ppc64,if=virtio -nographic - m 1024 -kernel /boot/ppc64/vmlinux-4.19.0-9-powerpc64le -initrd /boot/ppc64/ initrd.img-4.19.0-9-powerpc64le -curses -append "root=/dev/vda ro" Above is the minimal qemu command that I'm using. Below is the result, it stops after the "4." from "4.19.0-9". Copyright (c) 2004, 2017 IBM Corporation All rights reserved. This program and the accompanying materials are made available under the terms of the BSD License available at http://www.opensource.org/licenses/bsd-license.php Booting from memory... Linux ppc64le #1 SMP Debian 4. The kernel is from the package linux-image-4.19.0-9-powerpc64le which is a dependency of the package linux-image-ppc64el in Debian/Buster. The program qemu-system-ppc64 is from version 5.0-5 of the qemu-system-ppc package. Any suggestions on what I should try next? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Link to the video conference for today's discussion on cyber-security
by Alexar Pendashteh 20 Jun '20

20 Jun '20

Hey everyone! Here is the link for those who would like to join us in today's discussion on cyber-security: https://meet.google.com/ytx-vqct-bne This is provided to us by OWASP Foundation. You can find the details for the event on the following pages: https://www.meetup.com/Linux-Users-of-Victoria/events/271392426/ https://luv.asn.au/2020/06/20 Also, feel free to reply to this email with your feedback or comments on the topic. + Alexar -- [image: image.jpg] *Alexar Pendashteh* technologist / social entrepreneur https://github.com/pendashteh

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From the banning of MATLAB to the prospect of FOSS alternatives ...
by Wen Lin 19 Jun '20

19 Jun '20

https://www.smalltechnews.com/archives/159428 Title of the Article: Some Chinese colleges and universities are banned from MATLAB ,Turning to open source software to regain attention June 11, 2020 This is interesting. Implausible as it may be, it now seems that relying too heavily on proprietary software does carry a fair bit of risk! As the above news piece reported, at the moment the US is only banning certain US-made software (in this case, MATLAB) from being used by certain universities and research institutions in China. But then things tend to go down a slippery slope, wouldn't they? One day, it can be a whole country banned from using your favourite software, like MS Office, Photoshop, AutoCAD, ... all in the name of "National Security". No wonder more and more people are taking an interest in the Free and Open Source Software (FOSS for short) - Linux OS, LibreOffice, GIMP, OpenSSH, ... just to name a few! Just about any proprietary software out there, in any field, any sector, there is always the FOSS equivalent, ready to take its place. Like the software in this story - MATLAB. You can ban its use, but the students can easily find alternatives (e.g. SCILAB, R, or the Python programming language ...) that are not just as usable, but also free the users from the shackles of EULA's or the threat of ban ... That's why in recent times, from a city council to a University, and through to a whole third-world nation, the decision-makers are starting to think the unthinkable - ditching proprietary software for Free and Open Source alternatives! Sharing it here. Regards, Wen

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