Merge pull request #21 from usk54/update-day15-apt-sources-example

Update Day 15 APT sources example

Author: livialima

docs/15.md

@@ -33,9 +33,12 @@ The version number is particularly important because it controls the versions of
 
 We'll be discussing the "package manager" used by the Debian and Ubuntu distributions, and dozens of derivatives. This uses the `apt` command, but for most purposes the competing `yum` and `dnf` commands used by Fedora, RHEL, CentOS and Scientific Linux work in a very similar way - as do the equivalent utilities in  other versions.
 
-The configuration is done with files under the _/etc/apt_ directory, and to see where the packages you install are coming from, use `less` to view _/etc/apt/sources.list_ where you'll see lines that are clearly specifying URLs to a “repository” for your specific version:
+The configuration is done with files under the _/etc/apt_ directory, and to see where the packages you install are coming from, use `less` to view _/etc/apt/sources.list.d/ubuntu.sources_ where you'll see entries that specify repository URIs, suites, and components for your specific version:
 
-     deb http://archive.ubuntu.com/ubuntu precise-security main restricted universe
+     Types: deb
+     URIs: http://archive.ubuntu.com/ubuntu/
+     Suites: noble noble-updates noble-backports
+     Components: main restricted universe multiverse
 
 There's no need to be concerned with the exact syntax of this for now, but what’s fairly common is to want to add extra repositories - and this is what we'll deal with next.