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SSH To Multiple Machines Simultaneously with DSH
by Peter Reutemann 01 Jul '15

01 Jul '15

"Once you grow beyond managing one or two servers, you???ll find yourself wasting a ton of time if you don't have a way to run commands on multiple Linux computers simultaneously. In this post, I'll explain how to quickly run commands on large numbers of Linux machines at once." -- source: http://www.linuxtoday.com/upload/ssh-to-multiple-machines-simultaneously-wi… 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/

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Win XP lives OK!??
by Ian Young 26 Jun '15

26 Jun '15

Sorry this is utterly off-topic but couldn't resist. Stranger than fiction. http://www.theinquirer.net/inquirer/news/2414849/windows-xp-us-navy-throws-…

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MAC Address Privacy Standard Coming
by Lawrence D'Oliveiro 26 Jun '15

26 Jun '15

Every network interface (wired or wireless) on every networked device in the world is assigned a unique 48-bit identifier—the MAC address—burned into its ROM at manufacturing time. While it’s often (usually?) possible to change this via the software driver, nobody thought of it as a big deal. Until recently, when certain, ahem, spying revelations have woken people to the privacy implications of being able to track a machine, particularly on wi-fi networks, based on its unique MAC address. And so some folks at the Internet Engineering Task Force have been doing experiments to determine whether randomly changing these addresses would cause hiccups for any network protocols. The good news is that the answer so far seems to be “no”. <http://www.theregister.co.uk/2015/06/26/mac_address_privacy_inches_towards_…>

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How Long Should Microsoft Be Forced To Provide Windows XP Support?
by Lawrence D'Oliveiro 26 Jun '15

26 Jun '15

Reading about how the US Navy <http://www.theregister.co.uk/2015/06/25/us_navy_windows_xp_support/> has signed a contract to get continuing support from Microsoft for Windows XP, led me to wonder how long is a “reasonable” interval for Microsoft to continue to provide patches and updates for this ancient OS. My reasoning is thus: Windows XP is still under copyright. Microsoft still considers it to be its “intellectual property”. The term “property” is deliberately used, to convey the idea of something owned by Microsoft, not by you, the customer. All you get when you buy it is a “licence”, not ownership. But with property rights come property responsibilities. If your property is causing harm or nuisance to others, the onus is on you to fix it. Therefore, Microsoft’s responsibilities over its “intellctual property” should continue just as long as it claims those property rights. If unmaintained Windows XP machines are being exploited as parts of botnets or spam relays or virus vectors or whatever, the onus for fixing those problems should be on the property owner, right? Under current US copyright law, that duration would be 90 years from when Windows XP was first published, or, by my reckoning, the year 2091.

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F2FS Brings Per-File Encryption With Linux 4.2
by Peter Reutemann 25 Jun '15

25 Jun '15

"Based on the native encryption support added to EXT4 with the Linux 4.1 kernel, Linux 4.2 is bringing encryption support to the F2FS file-system. F2FS has been working on native encryption support in tandem with the EXT4 work and now it's been called for merging today into Linux 4.2. Jaegeuk Kim sent in the F2FS feature update for Linux 4.2 and it features per-file encryption support along with new capabilities for FALLOC_FL_ZERO_RANGE (converting a range of file to zeroes), FALLOC_FL_COLLAPSE_RANGE (removes a byte range from a file), and RENAME_WHITEOUT. The Flash-Friendly File-System for Linux 4.2 also has recovery for broken super-blocks, TRIM improvements, and various fixes. " -- source: http://www.phoronix.com/scan.php?page=news_item&px=F2FS-Encryption-Linux-4.2 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/

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Got Chrome? Google Just Silently Downloaded This Onto Your Computer
by Peter Reutemann 24 Jun '15

24 Jun '15

'On June 17th, Google did not announce (the news broke) that the DARPA affiliated corporation has been silently downloading audio listeners onto every computer that has Chrome. This effectively means that Google sees your privacy as piddly-squat, which does not necessarily come off as a surprise, when one considers Google’s censorship of We Are Change – this very organization as nothing. The website Private Internet Access‘s Rick Falkvinge reported how he came to understand this new policy: “It looked like just another bug report. “When I start Chromium, it downloads something.” Followed by strange status information that notably included the lines “Microphone: Yes” and “Audio Capture Allowed: Yes”. Without consent, Google’s code had downloaded a black box of code that – according to itself – had turned on the microphone and was actively listening to your room.”' -- source: http://wearechange.org/got-chrome-google-just-silently-downloaded-this-onto… Confirmed that on my box as well, when using the following URL: chrome://voicesearch/ Nice... 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/

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"Invite-Only" Ubuntu Mobile-Powered Meizu UX4 Goes On Sale
by Peter Reutemann 24 Jun '15

24 Jun '15

"Chinese manufacturer Meizu and Ubuntu developer Canonical have released the MX4 smartphone, but prospective owners will have to 'earn' an opportunity to buy the phone by playing an interactive origami game. Players are limited to three chances per day and this is the only way to buy the smartphone as it will no go on wider sale at a later date. The MX4 is the third Ubuntu Mobile smartphone to be released, following the BQ Aquaris E4.5 and E5 devices." -- source: http://news.slashdot.org/story/15/06/24/1642213 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/

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Linux 4.1 Kernel Released With EXT4 Encryption, Performance Improvements
by Peter Reutemann 22 Jun '15

22 Jun '15

"The Linux 4.1 kernel has been announced and its release brings expanded features for the Linux kernel including EXT4 file-system encryption, open-source GeForce GTX 750 support, performance improvements for Intel Atom / Bay Trail hardware, RAID 5/6 improvements, and other additions." -- source: http://linux.slashdot.org/story/15/06/22/1431243 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/

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Pi and BeagleBone for Dummies in library
by Ian Young 22 Jun '15

22 Jun '15

City libraries have titles in the Dummies series about the Raspberry Pi and BeagleBone. Much of the material is directed at providing information on Linux for beginners, covering much the same ground in both titles. There is also a primer on Python programming. Perhaps the most interesting information deals with hardware aspects of interfacing with the boards including several small projects. In related news the latest Distrowatch Weekly has an article on using a Raspberry Pi as a server for backups in a home network.

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Resurrecting The SuperH Architecture
by Lawrence D'Oliveiro 18 Jun '15

18 Jun '15

I guess this is more of an embedded thing, but ... <http://lwn.net/Articles/647636/> “He then asked what constitutes the minimal system that can run Linux. All that is really needed, he said, is a flat, 32-bit memory address space, a CPU with registers to hold instructions, some I/O and storage (from which the kernel and initramfs can be loaded), and a timer for interrupts. That plus GCC is sufficient to get Linux running—although it may not be fast, depending on the specifics. One does not even need a cache, floating-point unit, SMP, or a memory-management unit (MMU).” “The other main advantage of the J2 project is that the work for implementing SuperH support is already done in the kernel, GCC, GDB, strace, and most other system components.” “The project has thus "inherited" an excellent ISA, and has even been in contact with many of the former Hitachi employees that worked on SuperH.” “...there are many ASIC vendors who are happy to produce low-cost chips on their older equipment because the cost of retooling a plant is exorbitant. A 180nm implementation of the J2 design, he said, costs around three cents per chip, with no royalties required. "That's disposable computing at the 'free toy inside' level."” “At the end of the talk, an audience member voiced concern that SuperH was old enough that support for it is unmaintained in a lot of projects. He suggested that the J2 team might need to act quickly to stop its removal. Landley noted that, indeed, the latest buildroot release did remove SuperH support, "but we're trying to get them to put it back now."”

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