update arch linux notes page

content/notes/archlinux/index.md

@@ -1,9 +1,10 @@
 ---
 title: Archlinux
 date: 2023-11-29T20:33:48+0100
-lastmod: 2024-05-26T06:31:47+0000
+lastmod: 2024-06-15T21:14:19+0000
 tags:
   - archlinux
+  - systemd
 
 #showDate: false
 showReadingTime: false
@@ -23,6 +24,19 @@ A nice and informative article about unit files.
 
 <https://www.digitalocean.com/community/tutorials/understanding-systemd-units-and-unit-files>
 
+## Unlock locked user accounts
+
+If your user account is locked, wait 15 minutes (usually) and you can try again.
+
+If you need to unlock your account immediately: run this command (if you have another user
+that can login on the box):
+
+~~~console
+$ sudo faillock --user dominic --reset
+~~~
+
+Calling `faillock` without arguments show an overview.
+
 ## Predictable network interfaces
 
 Get back the "old" interface names like `eth0` or `wlan0` with