diff --git a/knowledge base/funtoo linux.md b/knowledge base/funtoo linux.md
new file mode 100644
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--- /dev/null
+++ b/knowledge base/funtoo linux.md	
@@ -0,0 +1,17 @@
+# Funtoo GNU/Linux
+
+```shell
+# Portage update.
+sudo ego sync
+sudo emerge --sync
+```
+
+## Further readings
+
+- [Installation] guide
+- [Portage]
+- [Profiles]
+
+[installation]: https://www.funtoo.org/Install
+[portage]: portage.md
+[profiles]: https://www.funtoo.org/Funtoo_Profiles
diff --git a/knowledge base/gentoo linux.md b/knowledge base/gentoo linux.md
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+++ b/knowledge base/gentoo linux.md	
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+# Gentoo GNU/Linux
+
+## Further readings
+
+- [Portage]
+
+[portage]: portage.md
diff --git a/knowledge base/portage.md b/knowledge base/portage.md
index 8f49dd3..08eba2e 100644
--- a/knowledge base/portage.md	
+++ b/knowledge base/portage.md	
@@ -1,16 +1,18 @@
 # Portage
 
-```shell
-# system update
-sudo emerge --sync
-sudo emerge --quiet --verbose --update --deep --newuse --with-bdeps=y --ask @world
-sudo emerge --depclean --ask
+## TL;DR
 
-# check active portage features
-portageq envvar FEATURES | xargs -n 1
+```shell
+# System update.
+sudo emerge --sync
+sudo emerge --depclean --ask
+sudo emerge -qv --update --deep --newuse --with-bdeps=y -a @world
+
+# Show what portage features are currently active.
+portageq envvar FEATURES | xargs -n1
 ```
 
-## Further readings
+## Sources
 
 - [/etc/portage]
 - [Portage]