tidy up older posts

_posts/2015-09-06-jekyll.md

@@ -25,11 +25,11 @@ when it comes to expanding. Not that Jekyll is all that convenient either.
 3. You have to rely on external providers for comment support. Maybe Disqus, or
    Facebook, or something else.
 
-But... 
+But...
 
 1. Markdown is fun to write in. It is clear, logical and the source is easy to
    read.
-2. Jekyll seems to do a good job of templating, without too much boilerplate. 
+2. Jekyll seems to do a good job of templating, without too much boilerplate.
 3. Having things like code highlighting taken care of is quite convenient.
 
 Setting up Jekyll is quite easy - the site has good instructions. I'll just

_posts/2018-06-24-alien-itches.md

 ---
 layout: post
-title: Arch on Alienware - scratching itches
+title: 'Arch on Alienware: Part II'
+subtitle: Scratching itches
 tags: [tech, linux]
 ---
 
@@ -8,17 +9,17 @@ So, it's been [half a year since][alien] I got the Alienware Aurora R7, and I
 have had my fair share of bugs and annoyances. Today, I'll talk about a few of
 those.
 
+<!-- section -->
+
 <aside markdown="1">
 
 > Every good work of software starts by scratching a developer's personal itch.
 
-[*The Cathedral and the Bazaar*][esr], Eric S. Raymond.
+&mdash; [*The Cathedral and the Bazaar*][esr],  
+Eric S. Raymond.
 
 </aside>
 
-
-<!-- section -->
-
 # Shutting down
 
 The Alienware series apparently has a fairly common  issue of panicking on

_posts/2019-06-30-poking-pi.md

 ---
 layout: post
 title: 'Poking around a Pi: Part I'
+subtitle: Initial setup
 tags: [tech, linux]
 description: Experiences with a Raspberry Pi 3B
 ---

_posts/2020-12-03-poking-pi-ii.md

 ---
 layout: post
-title: 'Poking around a Pi, Part II: VPNs and Network Namespaces'
+title: 'Poking around a Pi: Part II'
+subtitle: 'VPNs and Network Namespaces'
 tags: [tech, linux]
 description: Using a VPN only for a select group of applications
 
@@ -71,7 +72,7 @@ What do these commands do? Let's examine them block by block.
 
 1. Set up the namespace and enter it:
 
-    ```
+    ```sh
     NS_NAME=vpn
     ip netns add "$NS_NAME"
     ip netns exec "$SHELL"
@@ -112,7 +113,7 @@ What do these commands do? Let's examine them block by block.
 6. Enable IPv4 forwarding using `sysctl`
 
     ```
-    sudo sysctl -w net.ipv4.ip_forward=1
+    sysctl -w net.ipv4.ip_forward=1
     ```
 
 Then run OpenVPN in this network namespace (for example, by running the `openvpn` command itself here, or by using
@@ -175,10 +176,11 @@ OpenVPN client.
 
 A similar drop-in override can be used for other services (e.g., Kodi or a desktop session).
 
-**Note:** this doesn't protect against the VPN dying and leaving your services directly connected via your network. I
+This doesn't protect against the VPN dying and leaving your services directly connected via your network. I
 think that can be bluntly handled by having an `ExecStopPost` for the OpenVPN client which removes the default route
 altogether (and correspondingly have an `ExecStartPre` set up the default route instead of setting it in the one-shot
 service).
+{: .danger}
 
 
 [tb-linux]: https://www.tunnelbear.com/blog/linux_support/