Minor refresh, add admonitions and mention GNS3 early (unpin)

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

_posts/2024-09-14-getting-started.md

@@ -2,30 +2,37 @@
 title: Getting Started with Infix
 author: troglobit
 date: 2024-09-14 12:11:00 +0100
-last_modified_at: 2026-03-06 06:30:00 +0100
+last_modified_at: 2026-03-12 08:00:00 +0100
 categories: [howto]
 tags: [beginner]
-pin: true
 ---
 
 This is a guide for those who want to learn more about Infix using a
 hands-on approach.  You need a Linux 🐧 system with Qemu installed, we
 recommend [Debian][] based systems, like [Ubuntu][] and [Linux Mint][].
 
-> For a pain-free experience we recommend enabling CPU virtualization in
-> your BIOS/UEFI, which for many computers is disabled by default.
+> **Prefer a graphical environment or want to build multi-node topologies?**
+>
+> Infix is available in the [GNS3 Marketplace][GNS3] — install the
+> appliance and you can drag, drop, and cable up entire networks without
+> touching the command line.  See the [virtual environments][virt]
+> documentation to get started.
+{: .prompt-tip }
+
+### Installing Qemu
 
 From this point we assume you have your x86_64/AMD64 based Linux system
 up and running.  Time to start your favorite terminal application! 😃
 
-
-### Installing Qemu
-
 ```bash
 $ sudo apt install qemu-system-x86 virt-manager
 ...
 ```
 
+> For a pain-free experience we recommend enabling CPU virtualization in
+> your BIOS/UEFI, which for many computers is disabled by default.
+{: .prompt-tip }
+
 ### Download Infix
 
 Go to https://github.com/kernelkit/infix/releases/latest and scroll down
@@ -45,6 +52,7 @@ $ cd infix-x86_64-26.02.1/
 > Depending on how you have [set up your Linux][sudo] installation, the
 > following may require being run with superuser privileges, i.e., you
 > may need to prepend the command with `sudo`.
+{: .prompt-warning }
 
 ```bash
 $ ./qemu/run.sh
@@ -79,8 +87,11 @@ $ ./qemu/run.sh
 
 > Make sure to do a factory reset from the CLI, otherwise you will be
 > stuck with that single interface from before.
+{: .prompt-info }
 
 [sudo]:       https://troglobit.com/2016/12/11/a-life-without-sudo/
 [Debian]:     https://www.debian.org/
 [Ubuntu]:     https://ubuntu.com/
 [Linux Mint]: https://linuxmint.com/
+[GNS3]:       https://gns3.com/marketplace/appliances/infix
+[virt]:       https://www.kernelkit.org/infix/latest/virtual/