Interesting facts about Fedora Linux

Fedora Linux从2002年的一个本科生项目发展成为了一个由志愿者驱动的巨大社区努力,它补充了Red Hat Enterprise Linux,并产生了受欢迎的衍生产品如CentOS和Scientific Linux。本文将分享一些关于Fedora Linux的有趣事实,包括其名字的由来、100%免费开源软件的组成、标志的意义、不提供长期支持版本的特性、分布数量、活跃用户范围以及贡献者规模。

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On September 22nd this year, Fedora turned 10 years old. Since the historic announcement ten years ago, the Fedora Project has remained massive volunteer-driven community effort that complements the Red Hat Enterprise Linux, and has led to several popular spin-offs such as CentOS and Scientific Linux.

To celebrate its 10th birthday, I would like to share several interesting tidbits about Fedora Linux.

1. Fedora Linux started out as an undergraduate project by Warren Togami at the University of Hawaii in 2002. The goal of Fedora Linux was then to provide a single repository with well-tested packages for Red Hat Linux.

2. Fedora release names are suggested and voted on by the community. Name suggestions are solicited through aFedora wiki page, and the final release name is decided through a community vote. A suggested name for release N must have the same "is-a" relationship as the name for release N-1. For example, given the release name "Schrödinger's Cat" for Fedora 19, the name "Heisenbug" passes "is-a" test for Fedora 20; Schrödinger's Cat is a paradox where the object changes state when studied, and so is a Heisenbug.

3. Fedora consists of 100% free and open source software (FOSS). Items classified as content (e.g., fonts, package documentation, clipart, background images) must also be freely distributed without restrictions. A notable exception is binary-only firmware and driver files, in which case those files must not be able to run on their own in Fedora.

4. The Fedora Board is composed of a mix of community-elected seats and Red Hat-appointed seats.

5. Fedora logo symbolizes three elements combined: "infinity", "freedom" and "voice". This symbolsignifies the voice of the community that drives infinite freedom and innovation.

6. Unlike other major distros such as Debian, Ubuntu or Red Hat Enterprise Linux, Fedora does not offer a long-term support (LTS) version. Instead, Fedora commits to "release early, release often" principle (e.g., six month release schedule) to focus more on innovation and lead the progress of FOSS.

7. According to DistroWatch, there are 94 distributions based on Fedora, of which 27 are currently active.

8. When estimated by counting the distinct IP addresses connected to Fedora repositories, the total number of Fedora users per release is in the range of 1 to 7 millions.

9. The total number of contributors at the Fedora Project is over 25,000.

10. Fedora is the pre-installed operating system of XO laptops, famously known as $100 laptops developed by the One Laptop per Child (OLPC) non-profit organization. Fedora Linux is also used onIBM Roadrunner, a supercomputer built by IBM for the Los Alamos National Laboratory.


内容概要:该研究通过在黑龙江省某示范村进行24小时实地测试,比较了燃煤炉具与自动/手动进料生物质炉具的污染物排放特征。结果显示,生物质炉具相比燃煤炉具显著降低了PM2.5、CO和SO2的排放(自动进料分别降低41.2%、54.3%、40.0%;手动进料降低35.3%、22.1%、20.0%),但NOx排放未降低甚至有所增加。研究还发现,经济性和便利性是影响生物质炉具推广的重要因素。该研究不仅提供了实际排放数据支持,还通过Python代码详细复现了排放特征比较、减排效果计算和结果可视化,进一步探讨了燃料性质、动态排放特征、碳平衡计算以及政策建议。 适合人群:从事环境科学研究的学者、政府环保部门工作人员、能源政策制定者、关注农村能源转型的社会人士。 使用场景及目标:①评估生物质炉具在农村地区的推广潜力;②为政策制定者提供科学依据,优化补贴政策;③帮助研究人员深入了解生物质炉具的排放特征和技术改进方向;④为企业研发更高效的生物质炉具提供参考。 其他说明:该研究通过大量数据分析和模拟,揭示了生物质炉具在实际应用中的优点和挑战,特别是NOx排放增加的问题。研究还提出了多项具体的技术改进方向和政策建议,如优化进料方式、提高热效率、建设本地颗粒厂等,为生物质炉具的广泛推广提供了可行路径。此外,研究还开发了一个智能政策建议生成系统,可以根据不同地区的特征定制化生成政策建议,为农村能源转型提供了有力支持。
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