In the larger picture, what is in /proc/version is the version string of the (running) kernel, in particular here the version string of the Debian kernel package containing the kernel, not of the operating system. This is the Linux kernel package in Debian with Linux version 3.16.43 and Debian version 2+deb8u2. The suffix does indicate Debian 8, but the update number is the update number for the Debian package version, and is not the minor version number of the Debian operating system. You'll find this deb Nu M scheme used a lot in Debian package versions. The origin version here is 3.16.43, and the suffix is 2+deb8u2, known as the Debian version of the package. Next is all the software that you run on the computer. This string follows the convention of suffixing a local version string to the origin version string. Debian comes with over 50,000 packages (precompiled software that is bundled up in a nice format for easy installation on your machine) - all of it free. The actual version string, as you can see in that output, is 3.16.43-2+deb8u2. You can obtain the minor number in the Debian-specific way that is still the only mechanism mentioned in its FAQ document, which makes no mention of /etc/os-release at all: Use lsb_release or read the Debian-specific /etc/debian_version file, which does include the minor version number, again demonstrating that the minor number is considered part of the version.ĭebian is not the only operating system which does not include the minor version number in the version string in /etc/os-release. Yet that self-same announcement used "8.5" as the string in its headline. The only explanation that anyone has ever come up with for this is the rather weak one - admittedly proferred by a person known only by a pseudonym on a discussion forum and hardly in any way official - that the Release Announcement for 8.5 said "this update does not constitute a new version of Debian 8". At any given time, there is one stable release of Debian, which has the support of the Debian security team. Each version also corresponds to a set of named software repositories (at least one per CPU architecture). Debian does not include the minor version number in /etc/os-release, despite the clear indication in the manual that minor versions are allowed, and despite the inclusion of minor version numbers there by other Linux distributions. It is also (currently) known as stable or by its codename 'Bookworm'.
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