update arch notes page

content/notes/archlinux/index.md

@@ -1,7 +1,7 @@
 ---
 title: Archlinux
 date: 2023-11-29T20:33:48+0100
-lastmod: 2024-03-02T09:56:32+0000
+lastmod: 2024-04-13T10:21:20+0000
 tags:
   - archlinux
 
@@ -21,11 +21,40 @@ draft: true
 
 ## Predictable network interfaces
 
-### systemd.link
+Get back the "old" interface names like `eth0` or `wlan0` with
+[systemd.link](https://www.man.page/5/systemd.link).
 
-This might be useful, sometimes.
+### Ethernet
 
-<https://www.freedesktop.org/software/systemd/man/latest/systemd.link.html>
+This makes my ethernet interface be called **eth0** again.
+
+Create `/usr/lib/systemd/network/80-ether.link` with this content:
+
+~~~systemd
+[Match]
+Type=ether
+
+[Link]
+NamePolicy=keep kernel
+~~~
+
+Reboot.
+
+### Wireless
+
+This makes my wireless interface be called **wlan0** again.
+
+Create `/usr/lib/systemd/network/80-wlan.link` with this content:
+
+~~~systemd
+[Match]
+Type=wlan
+
+[Link]
+NamePolicy=keep kernel
+~~~
+
+Reboot.
 
 ## Prefer local DNS instead of systemd-resolved defaults