Improve selinux docs

Signed-off-by: manuelbuil <mbuil@suse.com>

Author: manuelbuil

docs/advanced.md

@@ -361,12 +361,12 @@ The [install script](./installation/configuration.md#configuration-with-install-
 
 </TabItem>
 
-<TabItem value="Manual Installation" default>
+<TabItem value="Manual Installation">
 
 The necessary policies can be installed with the following commands:
 ```bash
 yum install -y container-selinux selinux-policy-base
-yum install -y https://rpm.rancher.io/k3s/latest/common/centos/7/noarch/k3s-selinux-1.4-1.el7.noarch.rpm
+yum install -y https://rpm.rancher.io/k3s/latest/common/centos/9/noarch/k3s-selinux-1.6-1.el9.noarch.rpm
 ```
 
 To force the install script to log a warning rather than fail, you can set the following environment variable: `INSTALL_K3S_SELINUX_WARN=true`.
@@ -375,7 +375,7 @@ To force the install script to log a warning rather than fail, you can set the f
 
 ### Enabling SELinux Enforcement
 
-To leverage SELinux, specify the `--selinux` flag when starting K3s servers and agents.
+To leverage SELinux, specify the `--selinux` flag when starting K3s servers and agents or setting the K3S_SELINUX=true environment variable.
 
 This option can also be specified in the K3s [configuration file](./installation/configuration.md#configuration-file).
 

docs/installation/airgap.md

@@ -103,16 +103,19 @@ When running the K3s script with the `INSTALL_K3S_SKIP_DOWNLOAD` environment var
 
 #### SELinux RPM
 
-If you intend to deploy K3s with SELinux enabled, you will need also install the appropriate k3s-selinux RPM on all nodes. The latest version of the RPM can be found [here](https://github.com/k3s-io/k3s-selinux/releases/latest). For example, on CentOS 8:
+If running on an air-gapped node with SELinux enabled, you must manually install the k3s-selinux RPM before installing K3s. This RPM includes the necessary SELinux policies for K3s to run properly. The latest version of the RPM can be found [here](https://github.com/k3s-io/k3s-selinux/releases/latest). For example, on CentOS 8:
 
 ```bash
-On internet accessible machine:
-curl -LO https://github.com/k3s-io/k3s-selinux/releases/download/v1.4.stable.1/k3s-selinux-1.4-1.el8.noarch.rpm
+# On internet accessible machine:
+curl -LO https://github.com/k3s-io/k3s-selinux/releases/download/v1.6.stable.1/k3s-selinux-1.6-1.el8.noarch.rpm
 
 # Transfer RPM to air-gapped machine
-On air-gapped machine:
-sudo yum install ./k3s-selinux-1.4-1.el8.noarch.rpm
+sudo yum install ./k3s-selinux-1.6-1.el8.noarch.rpm
 ```
+The k3s-selinux RPM installation requires the following dependencies to be available in the OS:  
+    * container-selinux
+    * policycoreutils
+    * selinux-policy
 
 See the [SELinux](../advanced.md#selinux-support) section for more information.