diff --git a/knowledge base/baikal.md b/knowledge base/baikal.md
index 320a88b..91555a4 100644
--- a/knowledge base/baikal.md	
+++ b/knowledge base/baikal.md	
@@ -9,7 +9,7 @@
 ## TL;DR
 
 <details>
-  <summary>Installation and configuration</summary>
+  <summary>Setup</summary>
 
 ```sh
 docker pull 'ckulka/baikal-docker'
@@ -42,7 +42,7 @@ Ensure the following are available:
 ## Further readings
 
 - [Website]
-- [Github]
+- [Codebase]
 - [Self-hosting]
 
 ### Sources
@@ -65,8 +65,8 @@ Ensure the following are available:
 <!-- Upstream -->
 [baïkal dependencies]: https://github.com/sabre-io/Baikal/wiki/Ba%C3%AFkal-dependencies
 [baikal php error]: https://github.com/sabre-io/Baikal/issues/701
-[github]: https://github.com/sabre-io/Baikal
-[website]: https://sabre.io/baikal/
+[Codebase]: https://github.com/sabre-io/Baikal
+[Website]: https://sabre.io/baikal/
 
 <!-- Others -->
 [ckulka/baikal-docker]: https://github.com/ckulka/baikal-docker
diff --git a/knowledge base/linux/alpine.md b/knowledge base/linux/alpine.md
index 9ae3af7..6665c03 100644
--- a/knowledge base/linux/alpine.md	
+++ b/knowledge base/linux/alpine.md	
@@ -2,6 +2,7 @@
 
 1. [TL;DR](#tldr)
 1. [Further readings](#further-readings)
+   1. [Sources](#sources)
 
 ## TL;DR
 
@@ -30,12 +31,29 @@ addgroup 'nobody' 'docker'
 # Start services.
 rc-update add 'gitea'
 rc-service 'gitea' start
+
+# Upgrade to a new release branch.
+sed -i'.bak' -e 's/v3.22/v3.23/g' '/etc/apk/repositories' \
+&& apk add --upgrade --update-cache 'apk-tools' \
+&& apk upgrade --available \
+&& reboot
+
+# Update configuration files.
+find '/etc' -name "*.apk-new"
+diff '/etc/init.d/localmount' '/etc/init.d/localmount.apk-new' \
+&& mv -iv '/etc/init.d/localmount.apk-new' '/etc/init.d/localmount'
 ```
 
 ## Further readings
 
+- [Website]
+- [Documentation]
 - [APK]
 
+### Sources
+
+- [Upgrading Alpine Linux to a new release branch]
+
 <!--
   Reference
   ═╬═Time══
@@ -43,3 +61,8 @@ rc-service 'gitea' start
 
 <!-- Knowledge base -->
 [apk]: ../apk.md
+
+<!-- Upstream -->
+[Documentation]: https://wiki.alpinelinux.org/wiki/Main_Page
+[Upgrading Alpine Linux to a new release branch]: https://wiki.alpinelinux.org/wiki/Upgrading_Alpine_Linux_to_a_new_release_branch
+[Website]: https://alpinelinux.org/
diff --git a/knowledge base/turris os.md b/knowledge base/turris os.md
index fd5f2d7..fa50208 100644
--- a/knowledge base/turris os.md	
+++ b/knowledge base/turris os.md	
@@ -529,14 +529,15 @@ curl -sSL 'https://install.pi-hole.net' | bash
 /etc/.pihole/pihole -a -p
 
 # Update pi-hole as a whole, if needed.
+/etc/.pihole/pihole updatePihole
 /etc/.pihole/pihole -up
 
 # Set the router as the primary DNS server.
-sed -E -i.bak 's|^#?\s*DNS\s*=\s*.*$|DNS=192.168.1.1|' '/etc/systemd/resolved.conf'
+sed -E -i'.bak' 's|^#?\s*DNS\s*=\s*.*$|DNS=192.168.1.1|' '/etc/systemd/resolved.conf'
 
 # Set Cloudflare as the fallback DNS server.
 # Optional.
-sed -E -i.bak 's|^#?\s*FallbackDNS\s*=\s*.*$|FallbackDNS=1.1.1.1 1.0.0.1 2606:4700:4700::1111 2606:4700:4700::1001 # Cloudflare|' '/etc/systemd/resolved.conf'
+sed -E -i'.bak' 's|^#?\s*FallbackDNS\s*=\s*.*$|FallbackDNS=1.1.1.1 1.0.0.1 2606:4700:4700::1111 2606:4700:4700::1001 # Cloudflare|' '/etc/systemd/resolved.conf'
 
 # Set the interface to ignore DNS lists given by the DHCP server.
 cp '/etc/systemd/network/eth0.network' '/etc/systemd/network/eth0.network.bak'