- wlug - University of Waikato Mail Lists

Amazon's New SSL/TLS Implementation In 6,000 Lines of Code
by Peter Reutemann 01 Jul '15

01 Jul '15

'Amazon has announced a new library called "s2n," an open source implementation of SSL/TLS, the cryptographic security protocols behind HTTPS, SSH, SFTP, secure SMTP, and many others. Weighing in at about 6k lines of code, it's just a little more than 1% the size of OpenSSL, which is really good news in terms of security auditing and testing. OpenSSL isn't going away, and Amazon has made clear that they will continue to support it. Notably, s2n does not provide all the additional cryptographic functions that OpenSSL provides in libcrypto, it only provides the SSL/TLS functions. Further more, it implements a relatively small subset of SSL/TLS features compared to OpenSSL.' -- source: http://it.slashdot.org/story/15/07/01/0214248 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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GMT Versus UTC
by Lawrence D'Oliveiro 01 Jul '15

01 Jul '15

It still seems to be common among groups outside the computing and scientific worlds to talk about “GMT” rather than “UTC”. The trouble with “GMT” is that it doesn’t seem to be clearly defined; it might or might not differ from UTC by up to 0.9 seconds. The (unadjusted) time reference defined by an official collection of atomic clocks worldwide is called “TAI”. This pays no heed to the slowing rotation of the Earth. Astronomers prefer a time reference called “UT1”, which is based on the actual rotation of the Earth (subject to some time-averaging, I think). The definition of “UTC” comes from TAI, adjusted by applying leap seconds. These accumulate as needed so as to keep UTC within 0.9 seconds of UT1, and we are currently up to 36 of them. That is, at 0:00:00 UTC today, TAI was actually 0:00:36. The trouble with GMT is that it is not officially clear whether it is the same as UT1, or the same as UTC. Given that it was originally defined at the Greenwich Observatory, which was (is?) run by astronomers, one would think they would make it the same as UT1. But the practical fact is, our usual everyday timekeeping is based on standard time zones, which are all defined as whole-second (indeed, whole multiples of a half-hour) offsets from UTC.

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How Long Can A Filename Be?
by Lawrence D'Oliveiro 30 Jun '15

30 Jun '15

Allowed length of an individual file/directory name: ldo@theon:~> getconf NAME_MAX / 255 Allowed length of a full path name: ldo@theon:~> getconf PATH_MAX / 4096 The answers can be filesystem-specific; here “/” is an ext3 filesystem. But on my /home, which is ext4, I get the same numbers.

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Reuters: Samsung won’t give up on Tizen OS, plans more phones this year
by Peter Reutemann 30 Jun '15

30 Jun '15

'Samsung still loves its home-grown operating system. A report from Reuters says the company is planning more Tizen phones for 2015, and they'll come in at "varying prices."' -- source: http://arstechnica.com/gadgets/2015/06/reuters-samsung-wont-give-up-on-tize… 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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So How Did Your Leap-Second Go?
by Lawrence D'Oliveiro 30 Jun '15

30 Jun '15

At noon today NZ time, an extra second was inserted into UTC, the time kept by the world’s atomic clocks. The time that was one second before midnight UTC (one second before noon NZST) became two seconds before intead: after 23:59:59 UTC came 23:59:60 UTC, before ticking over to 0:00:00 UTC. The previous time this happened, three years ago, several Linux-based systems malfunctioned. No word yet on how this one went... <http://lwn.net/Articles/648313/>

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Doing For Video What PulseAudio Did For Audio
by Lawrence D'Oliveiro 30 Jun '15

30 Jun '15

Pinos is a project to allow better handling of video input across multiple applications. Pinos will make it easier to switch cameras in applications and for the same camera source to be used by multiple apps simultaneously, there will be support for multiple types of video inputs, GStreamer integration, and some audio support. Pinos should allow better screencasting within GNOME 3, video support for desktop sandboxes, and many other potential use-cases. In an email, Christian mentioned why it didn't end up being called PulseVideo over name squatting. <http://phoronix.com/scan.php?page=news_item&px=Fedora-Pinos-Announced>

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presentations/demos for next meeting
by Peter Reutemann 30 Jun '15

30 Jun '15

Hi everyone At the moment, we're still looking for a theme (read presenters) for this month's WLUG meeting on July 27. Any takers? As a fallback option, I was thinking of giving the new Linux Mint 17.2 a spin (MATE and Cinnamon) and Ian has plenty of Debian 8 installations on his machine to show off briefly. Thanks. 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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How to upgrade Debian Wheezy to Jessie safely
by Peter Reutemann 30 Jun '15

30 Jun '15

"This tutorial explains how to upgrade your Debian system from Wheezy to Jessie in a few simple steps. Before you start with the upgrade, backup all critical data. Thats especially the config data in the /etc directory and the user data in /home. When you run a server then you should include the databases (MySQL, Postgresql, etc), web and email data in the backup as well." -- source: http://www.linuxtoday.com/infrastructure/how-to-upgrade-debian-wheezy-to-je… 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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SSH To Multiple Machines Simultaneously with DSH
by Peter Reutemann 30 Jun '15

30 Jun '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 25 Jun '15

25 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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