The Debian 9.13 is now available for download as the latest update to version 9, also known as Stretch. As always, changelog reports software enhancements and security fixes.
"After this release, its Security and Release Teams Debian will no longer develop updates for Debian 9. Users wishing to continue receiving security updates should upgrade to Debian 10 or refer to the address https://wiki.debian.org/LTS for details on the subset of the architectures and packages covered by the Long Term Support project, ”says the development team.
The new version includes major bug fixes and security enhancements, such as patches for memory corruption issues and memory leaks. It also resolves login errors in TLS 1.2 that some users have encountered while trying to connect to specific hosting providers.
From here you can see the whole changelog.
As for the updated software, there are new versions of Firefox, Thunderbird and all the other packages that come with Debian. Those who update their devices on a regular basis will already be using some of the updated applications.
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ISO - Live DVD