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LibrePlanet forever! Watch five sessions from 2015 online

Videos for 5 LibrePlanet sessions are available, including "Stand up for the GNU GPL!" by Karen Sandler, "Free software, free hardware, and other things" by Richard Stallman, "Let's encrypt" by Seth Schoen, "Style or substance? Free software is totally the 80's" by Deb Nicholson, and "Federation and GNU" by Chris Webber.

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3 big lessons I learned from running an open source company (Opensource.com)

Over at Opensource.com, Lucidworks co-founder and CTO Grant Ingersoll writes about lessons he has learned from running an open-source company. "You might ask, 'Why not open source it all and just provide support?' It's a fair question and one I think every company that open sources code struggles to answer, unless they are a data company (e.g., LinkedIn, Facebook), a consulting company, or a critical part of everyone's infrastructure (e.g., operating systems) and can live off of support alone. Many companies start by open sourcing to gain adoption and then add commercial features (and get accused of selling out), whereas others start commercial and then open source. Internally, the sales side almost always wants "something extra" that they can hang their quota on, while the engineers often want it all open because they know they can take their work with them."

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How to Make Money from Open Source Platforms (Linux.com)

Over at Linux.com, John Mark Walker examines why companies aren't making money on pure open source ventures. "It is not that there is no money in selling open source software, but rather that the business models have shifted. Whereas, under the old proprietary world, a larger percentage of money went to pure software vendors, now that money has spread among a larger spectrum of companies and industries; lots of people get paid to work on or with open source software, but an increasing number of them don’t work for software vendors, per se. In addition to looking in all the wrong places, the current investment model is suspicious of an open source approach. The vast majority of venture capitalists, especially in Silicon Valley, are very risk averse and shy away from open source products that, in their view, will not give as large a return on their investment. In order to secure the funding required to scale a company, investors will frequently require that the startup company include proprietary bits as tools to increase revenue and margins. These two factors - diffusion of revenue and risk-averse investors - combine to both give a false impression and, in part due to the false impression, prevent pure open source software vendors from getting funding."

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CFP Deadlines: May 21, 2015 to July 20, 2015

The following listing of CFP deadlines is taken from the LWN.net CFP Calendar.

Deadline	Event Dates	Event	Location
May 23	August 22 August 23	Free and Open Source Software Conference	Sankt Augustin, Germany
May 23	May 23 May 25	Wikimedia/MediaWiki European Hackathon	Lyon, France
May 31	October 2 October 4	PyCon India 2015	Bangalore, India
June 1	November 18 November 22	Build Stuff 2015	Vilnius, Lithuania
June 1	July 3 July 5	SteelCon	Sheffield, UK
June 5	August 20 August 21	Linux Security Summit 2015	Seattle, WA, USA
June 6	September 29 September 30	Open Source Backup Conference 2015	Cologne, Germany
June 11	June 25 June 28	Linux Vacation Eastern Europe 2015	Grodno, Belarus
June 15	August 15 August 22	DebConf15	Heidelberg, Germany
June 15	September 24	PostgreSQL Session 7	Paris, France
June 15	November 17 November 18	PGConf Silicon Valley	San Francisco, CA, USA
June 17	October 5 October 7	LinuxCon Europe	Dublin, Ireland
June 17	October 5 October 7	Embedded Linux Conference Europe	Dublin, Ireland
June 19	August 20	Tracing Summit	Seattle, WA, USA
June 28	August 28 September 3	ownCloud Contributor Conference	Berlin, Germany
June 28	November 11 November 13	LDAP Conference 2015	Edinburgh, UK
June 30	November 16 November 19	Open Source Monitoring Conference 2015	Nuremberg, Germany
July 5	October 27 October 29	Open Source Developers' Conference	Hobart, Tasmania
July 15	October 8 October 9	CloudStack Collaboration Conference Europe	Dublin, Ireland
July 15	October 27 October 30	OpenStack Summit	Tokyo, Japan
July 15	November 6 November 8	Jesień Linuksowa 2015	Hucisko, Poland
July 17	October 2 October 3	Ohio LinuxFest 2015	Columbus, OH, USA
July 19	September 25 September 27	PyTexas 2015	College Station, TX, USA

If the CFP deadline for your event does not appear here, please tell us about it.

EuroPython 2015: Come with your partners

EuroPython will take place July 20-26 in Bilbao, Spain. The organizers have announced the EuroPython Partner Program, which offers interesting tours for EuroPython attendees and their partners. The registration deadline for the tours is June 20, seats are limited.

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Next year's Intl. Day Against DRM: Are you in?

The FSF's DefectiveByDesign campaign reports that the 2015 International Day Against DRM was the biggest ever and urges everyone to help make the 2016 edition better still.

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Events: May 21, 2015 to July 20, 2015

The following event listing is taken from the LWN.net Calendar.

Date(s)	Event	Location
May 18 May 22	OpenStack Summit	Vancouver, BC, Canada
May 19 May 21	SAMBA eXPerience 2015	Goettingen, Germany
May 20 May 22	SciPy Latin America 2015	Posadas, Misiones, Argentina
May 21 May 22	ScilabTEC 2015	Paris, France
May 23 May 24	Debian/Ubuntu Community Conference Italia - 2015	Milan, Italy
May 23 May 25	Wikimedia/MediaWiki European Hackathon	Lyon, France
May 30 May 31	Linuxwochen Linz 2015	Linz, Austria
June 1 June 2	Automotive Linux Summit	Tokyo, Japan
June 3 June 5	LinuxCon Japan	Tokyo, Japan
June 3 June 6	Latin American Akademy	Salvador, Brazil
June 5 June 7	PyCon APAC 2015	Taipei, Taiwan
June 8 June 10	Yet Another Perl Conference 2015	Salt Lake City, UT, USA
June 10 June 13	BSDCan	Ottawa, Canada
June 11 June 12	infoShare 2015	Gdańsk, Poland
June 12 June 14	Southeast Linux Fest	Charlotte, NC, USA
June 16 June 20	PGCon	Ottawa, Canada
June 22 June 23	DockerCon15	San Francisco, CA, USA
June 23 June 26	Red Hat Summit	Boston, MA, USA
June 23 June 25	Solid Conference	San Francisco, CA, USA
June 23 June 26	Open Source Bridge	Portland, Oregon, USA
June 25 June 28	Linux Vacation Eastern Europe 2015	Grodno, Belarus
June 25 June 26	Swiss PostgreSQL Conference	Rapperswil, Switzerland
June 26 June 27	Hong Kong Open Source Conference 2015	Hong Kong, Hong Kong
June 26 June 28	FUDCon Pune 2015	Pune, India
July 3 July 5	SteelCon	Sheffield, UK
July 4 July 10	Rencontres Mondiales du Logiciel Libre	Beauvais, France
July 6 July 12	SciPy 2015	Austin, TX, USA
July 7 July 10	Gophercon	Denver, CO, USA
July 15 July 19	Wikimania Conference	Mexico City, Mexico
July 18 July 19	NetSurf Developer Weekend	Manchester, UK

If your event does not appear here, please tell us about it.