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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Azure Linux In, CentOS Out: LinkedIn Switches its Server Operating System (news.itsfoss.com)

submitted 2 months ago by [email protected] to c/[email protected]

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As part of a massive migration campaign, LinkedIn has successfully moved their operations to Microsoft's Azure Linux as of April 2024, ditching CentOS 7 in the process and taking advantage of a more modern compute platform.

As many of you might already know, back on June 30, 2024, CentOS 7 reached the end-of-life status, resulting in no new future updates for it, including fixes for critical security vulnerabilities.

...

The developers have gone with the high-performing XFS filesystem, which was made to work with Azure Linux to fit LinkedIn's use case. In their testing, they found that XFS was performing well for most of their applications, except Hadoop, which is used for their analytics workloads.

When they compared the issues that cropped up, XFS came out as a more stable and reliable choice than the other candidate, Ext4.

...

Additionally, LinkedIn's MaaS (Metal-as-a-Service) team has developed a new Azure Linux Image Customizer tool for automating image generation, that takes an existing generic Azure Linux image, and modifies it to use with a given scenario. In this case, a tailored image for LinkedIn.

LinkedIn Engineering Blog: Navigating the transition: adopting Azure Linux as LinkedIn’s operating system

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[–] [email protected] 15 points 2 months ago

Microsoft has had an impressively positive impact on Linux, including the kernel directly. It started ramping up about 15 years ago. They were the 5th highest contributor to the 3.x kernel.

I recall reading about them working on improving Linux's MS related features, like fat32 support, samba, and things to make Linux run better in hyper-v that also helped performance overall.