who is the current maintainer of the linux kernel ​
Linux kernel While Linus Torvalds supervises code changes and releases to the latest kernel versions, he has delegated the maintenance of older versions to other programmers.[142] Major releases as old as 2.0 (officially made obsolete with the kernel 2.2.0 release in January 1999) are maintained as needed, although at a very slow pace.
Supervisory program Historically, this term was essentially associated with IBM's line of mainframe operating systems starting with OS/360. In other operating systems, the supervisor is generally called the kernel.
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Single user mode Unix-like operating systems provide single user mode functionality either through the System V-style runlevels, BSD-style boot-loader options, or other boot-time options.
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Linux kernel Version 3.10 of the Linux kernel, released in June 2013, contains 15,803,499 lines of code,[26] while the version 4.1, released in June 2015, has grown to over 19.5 million lines of code contributed by almost 14,000 programmers.[27]