diff --git a/knowledge base/tmux.placeholder b/knowledge base/tmux.placeholder
index efa842c..9c6a044 100644
--- a/knowledge base/tmux.placeholder	
+++ b/knowledge base/tmux.placeholder	
@@ -28,6 +28,12 @@ set -g renumber-windows on    # renumber all windows when a window is closed
 
 https://github.com/tmux/tmux/wiki/
 
+```sh
+# Dedicate sessions to commands.
+# Attach to the session if it already exists, or create it otherwise.
+tmux new-session -As 'gitlab-upgrade' "dnf update 'gitlab-ee'"
+```
+
 ```sh
 # Operate on a background session from another one.
 tmux new-session -d -S 'session-name'