More examples in README

README.md

@@ -5,20 +5,30 @@ Labels commonly include operating system name, version, and architecture.
 
 | Operating System | Labels assigned by plugin                                                                            |
 | ---------------- | ---------------------------------------------------------------------------------------------------- |
+| Alpine           | `3.9.4` `Alpine` `Alpine-3.9.4` `amd64` `amd64-Alpine` `amd64-Alpine-3.9.4`                          |
 | Amazon Linux     | `2018.03` `AmazonAMI` `AmazonAMI-2018.03` `amd64` `amd64-AmazonAMI` `amd64-AmazonAMI-2018.03`        |
 | Amazon Linux 2   | `2` `Amazon` `Amazon-2` `amd64` `amd64-Amazon` `amd64-Amazon-2`                                      |
 | CentOS 6         | `6.10` `CentOS` `CentOS-6.10` `amd64` `amd64-CentOS` `amd64-CentOS-6.10`                             |
 | CentOS 7         | `7.4.1708` `CentOS` `CentOS-7.4.1708` `amd64` `amd64-CentOS` `amd64-CentOS-7.4.1708`                 |
 | Debian 9         | `9.11` `Debian` `Debian-9.11` `amd64` `amd64-Debian` `amd64-Debian-9.11`                             |
 | Debian 10        | `10` `Debian` `Debian-10` `amd64` `amd64-Debian` `amd64-Debian-10`                                   |
+| Debian testing   | `testing` `Debian` `Debian-testing` `amd64` `amd64-Debian` `amd64-Debian-testing`                    |
 | FreeBSD 11       | `11.1-STABLE` `amd64` `amd64-freebsd` `amd64-freebsd-11.1-STABLE` `freebsd` `freebsd-11.1-STABLE`    |
 | FreeBSD 12       | `12.0-RELEASE` `amd64` `amd64-freebsd` `amd64-freebsd-12.0-RELEASE` `freebsd` `freebsd-12.0-RELEASE` |
+| Ubuntu 14.04     | `14.04` `Ubuntu` `Ubuntu-14.04` `amd64` `amd64-Ubuntu` `amd64-Ubuntu-14.04`                          |
 | Ubuntu 16.04     | `16.04` `Ubuntu` `Ubuntu-16.04` `amd64` `amd64-Ubuntu` `amd64-Ubuntu-16.04`                          |
 | Ubuntu 18.04     | `18.04` `Ubuntu` `Ubuntu-18.04` `amd64` `amd64-Ubuntu` `amd64-Ubuntu-18.04`                          |
 | Windows 10       | `10.0` `amd64` `amd64-windows` `amd64-windows-10.0` `windows` `windows-10.0`                         |
 
 On Linux computers, the plugin uses the output of the `lsb_release` command.
-If `lsb_release` is not installed, labels on Linux machines will be guessed based on values in /etc/os-release.
+
+If `lsb_release` is not installed, labels on Linux agents will be guessed based on values in /etc/os-release.
+When /etc/os-release is used, less detailed labels are provided.
+For example:
+
+| Operating System | Labels assigned by plugin when lsb-release is not installed     |
+| ---------------- | --------------------------------------------------------------- |
+| CentOS 7         | `7` `CentOS` `CentOS-7` `amd64` `amd64-CentOS` `amd64-CentOS-7` |
 
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