October 2018 - wlug - University of Waikato Mail Lists

by Lawrence D'Oliveiro

For quite a while now, I’ve been annoyed by the system notification volume going to 100% on my Debian systems, regardless of my attempts to set it to a lower level. For example, when I open the KDE System Settings app, change something, then try to close the window, the sound that accompanies the save/discard/cancel alert is always startlingly loud. I think I have finally found a fix: in your /etc/pulse/daemon.conf, put in a line saying flat-volumes = no (You should find an existing comment “; flat-volumes = yes” that indicates the default.) You can make this new setting take effect in the current session immediately without having to logout or reboot, by executing the following as the currently-logged-in user: pulseaudio -k (This kills and restarts the PulseAudio daemon for your user session.) There are several discussions of the pros and cons of this issue online, going back some years. For example, here <https://bugzilla.redhat.com/show_bug.cgi?id=1265267>. Also a mention about the “flat-volumes” setting in the ever-reliable Arch Linux Wiki here <https://wiki.archlinux.org/index.php/PulseAudio>.

4 days, 7 hours

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Does Wi-Fi Security Really Matter?

by Lawrence D'Oliveiro

Seems the Wi-Fi Alliance is having yet another crack at coming up with a really secure protocol, this time to be called WPA3 <http://www.theregister.co.uk/2018/01/09/wi_fi_wpa3/>. Does anybody care? Remember that on the Internet, security is implemented between the endpoints, the protocols are designed not to care that everything in-between might be pawed through by eavesdroppers, or even active attackers trying to inject fake data.

1 year, 9 months

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Microsoft Fixes Notepad

by Lawrence D'Oliveiro

Windows Notepad has never been able to handle any newline convention other than the old DOS/Windows/CP/M one (CR-LF). Now, after so many decades, Microsoft has finally decided to give it “universal newline” capability, so it can handle lines ending in LF-only (Unix/Linux) and CR-only (old MacOS) <http://www.theregister.co.uk/2018/05/08/windows_notepad_unix_macos_line_end…>. Gee, I wonder how many lines of code that took...

2 years, 1 month

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AGM

by Peter Reutemann

Hi everyone For those who weren't at the meeting last night or aren't on meetup.com, the WLUG AGM is next month: https://www.meetup.com/WaikatoLinuxUsersGroup/events/246737212/ Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 years, 2 months

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Booting a Raspberry-Pi 3B without using a SD-Card

by Ian Stewart

Hi, If you have a Raspberry Pi Model 3B, then you may be able use it with no micro SD-Card and have it boot Raspbian off a USB flash drive stick. I have found this possible with an Apacer AH356 64GB USB 3.1 Flash Drive<https://www.pbtech.co.nz/product/MEMAPC11464/Apacer-AH356-64GB-USB-31-Flash…> stick that I bought from PB-Tech a couple of weeks ago for $21.85. Admittedly you can buy a micro SD-card like the Apacer 64GB microSDXC UHS-I Class10<https://www.pbtech.co.nz/product/MEMAPC81064/Apacer-64GB-microSDXC-UHS-I-Cl…> from PB-Tech for $28.75 and put Raspbian onto it. So using the USB flash drive stick only saves a few dollars. However, there may be other advantages over using a USB flash drive vs. a micro SD-Card for the Raspbian OS. For example, you can shutdown the Raspberry Pi and remove the USB stick, take it to another computer, and backup your data. I also installed the Raspbian distro onto WD Elements Portable 2TB 2.5" USB 3.0 External HDD<https://www.pbtech.co.nz/product/HDDWDX2621/WD-Elements-Portable-2TB-25-USB…> which PB-Tech sell for $129. The R-Pi (with no SD-Card) would not boot this drive. Possibly because the USB drive is too slow to initialize after power on??? I also found that the R-Pi would not boot up Raspbian on an old 8GB Kingston USB flash drive. Maybe its too slow to initialize??? All the above tests were done using the current latest Raspbian release which is dated 2018_10_09. FYI: Below are details on how to install the Raspbian distro image onto a USB flash drive stick. cheers, Ian. Installing the Raspbian distro onto USB flash drive... Download the latest 1.4GB Raspbian distribution file: 2018-10-09-raspbian-stretch.zip Unzip the file to create a 4.1GB image file: 2018-10-09-raspbian-stretch.img Copy the 4.1GB image to a USB flash drive stick... $ sudo dd bs=4M if=2018-10-09-raspbian-stretch.img of=/dev/sdX status=progress conv=fsync Note: For the device /dev/sdX replace the X with the drive letter of your USB flash drive stick. e.g. /dev/sdc Insert the USB flash drive stick into the R-Pi model 3B. Remove any SD-Card that may be installed in the Raspberry Pi. Power on the R-Pi. After about 10 seconds the colourful POST display will appear, and the USB stick will commence its first boot. It will detect that it is a 4.1GB partition, expand to being a partition that fills the whole of the USB flash drive stick and reboot. The second reboot will be slow and takes about one minute. I assume it is expanding the squashed file system??? Subsequent reboots are faster.

2 years, 2 months

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IBM To Buy Red Hat, the Top Linux Distributor, For $34 Billion

by Peter Reutemann

'International Business Machines (IBM) is acquiring software maker Red Hat in a deal valued at $34 billion, the companies said Sunday. From a report: The purchase, announced on Sunday afternoon, is the latest competitive step among large business software companies to gain an edge in the fast-growing market for Internet-style cloud computing. In June, Microsoft acquired GitHub, a major code-sharing platform for software developers, for $7.5 billion. IBM said its acquisition of Red Hat was a move to open up software development on computer clouds, in which software developers write applications that run on remote data centers. >From a press release: This acquisition brings together the best-in-class hybrid cloud providers and will enable companies to securely move all business applications to the cloud. Companies today are already using multiple clouds. However, research shows that 80 percent of business workloads have yet to move to the cloud, held back by the proprietary nature of today's cloud market. This prevents portability of data and applications across multiple clouds, data security in a multi-cloud environment and consistent cloud management. IBM and Red Hat will be strongly positioned to address this issue and accelerate hybrid multi-cloud adoption. Together, they will help clients create cloud-native business applications faster, drive greater portability and security of data and applications across multiple public and private clouds, all with consistent cloud management. In doing so, they will draw on their shared leadership in key technologies, such as Linux, containers, Kubernetes, multi-cloud management, and cloud management and automation. IBM's and Red Hat's partnership has spanned 20 years, with IBM serving as an early supporter of Linux, collaborating with Red Hat to help develop and grow enterprise-grade Linux and more recently to bring enterprise Kubernetes and hybrid cloud solutions to customers. These innovations have become core technologies within IBM's $19 billion hybrid cloud business. Between them, IBM and Red Hat have contributed more to the open source community than any other organization.' -- source: https://linux.slashdot.org/story/18/10/28/1859245 That completely flew under the radar! I still remember from my Unix sysadmin course at uni back in the days (using IBM's AIX), when an IBM guy came in for some guest lectures and mentioned that they are ramping up their investment in Linux and also offer Linux next to their own AIX Unix systems. Well, Linux has definitely come a long way! Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 years, 2 months

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'Open Source Creators: Red Hat Got $34 Billion and You Got $0. Here's Why.'

by Peter Reutemann

'Donald Fischer, who served as a product manager for Red Hat Enterprise Linux during its creation and early years of growth, writes: Red Hat saw, earlier than most, that the ascendance of open source made the need to pay for code go away, but the need for support and maintenance grew larger than ever. Thus Red Hat was never in the business of selling software, rather it was in the business of addressing the practical challenges that have always come along for the ride with software. [...] As an open source developer, you created that software. You can keep your package secure, legally documented, and maintained; who could possibly do it better? So why does Red Hat make the fat profits, and not you? Unfortunately, doing business with large companies requires a lot of bureaucratic toil. That's doubly true for organizations that require security, legal, and operational standards for every product they bring in the door. Working with these organizations requires a sales and marketing team, a customer support organization, a finance back-office, and lots of other "business stuff" in addition to technology. Red Hat has had that stuff, but you haven't. And just like you don't have time to sell to large companies, they don't have time to buy from you alongside a thousand other open source creators, one at a time. Sure, big companies know how to install and use your software. (And good news! They already do.) But they can't afford to put each of 1100 npm packages through a procurement process that costs $20k per iteration. Red Hat solved this problem for one corner of open source by collecting 2,000+ open source projects together, adding assurances on top, and selling it as one subscription product. That worked for them, to the tune of billions. But did you get paid for your contributions?' -- source: https://linux.slashdot.org/story/18/10/31/1520256 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 years, 2 months

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The CAP Theorem Strikes Again

by Lawrence D'Oliveiro

There is a fundamental rule with distributed databases: you can pick any two of: * Maintaining data Consistency across the entire network * Maintaining data Availability across the entire network * Being able to deal with a Partitioning of the network into two or more disconnected pieces but you can never have all three. An example of this is the outage at GitHub earlier this month <https://www.theregister.co.uk/2018/10/31/github_lost_a_network_link_for_43_…>. A link broke between the east-coast and west-coast halves of their network, and in an effort to maintain ongoing service availability on both sides of the partition, they ended up sacrificing consistency of the data. Which came back to bite them when the link was re-established, and the inconsistency could not easily be resolved.

2 years, 2 months

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The DNS Encryption Controversy

by Lawrence D'Oliveiro

There is a rather acrimonious argument currently going on among the Internet technorati over two different competing protocols for implementing encryption of domain name (DNS) queries <https://www.theregister.co.uk/2018/10/30/doh-contorversy/>. One of them is called “DNS-over-TLS” and the other is “DNS-over-HTTPS”. The former passes the DNS queries over its own TLS-encrypted connection, while the latter piggybacks on good old HTTP, using the latter’s TLS capability instead. The former is clearly simpler, and one might say “purer”, but the latter is deliberately designed to make it hard to tell what DNS queries a user might be making, since they become indistinguishable from regular HTTPS connections. So the question becomes, do you see this obfuscation as a good thing or a bad thing? It is intended to prevent snoops (both Governmental and non-Governmental) from invading the privacy of users, but it also blocks “legitimate” analysis of traffic by network admins trying to manage their systems as well. Clearly, you can’t do one without the other. So is the price worth paying?

2 years, 2 months

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Fedora 29 Released

by Peter Reutemann

'Fedora 29 is released today. Among the new features are the ability to allow parallel installation of packages such as Node.js. Fedora 29 also supports ZRAM (formerly called compcache) for ARMv7 and v8. In addition to the more efficient use of RAM, it also increases the lifespan of microSD cards on the Raspberry Pi as well as other SBCs. "Additionally, UEFI for ARMv7 is now supported in Fedora 29, which also benefits Raspberry Pi users," reports TechRepublic. "Fedora already supported UEFI on 64-bit ARM devices."' -- source: https://linux.slashdot.org/story/18/10/30/229249 Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/

2 years, 2 months

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wlug October 2018