diff --git a/linux/ubuntu.txt b/linux/ubuntu.txt
index 355b8ca..5ee597a 100644
--- a/linux/ubuntu.txt
+++ b/linux/ubuntu.txt
@@ -3,6 +3,10 @@
 https://extensions.gnome.org/extension/2/move-clock/
 (2)system-monitor By Cerin
 https://extensions.gnome.org/extension/120/system-monitor/
+(3)astra-monitor
+https://extensions.gnome.org/extension/6682/astra-monitor/
+(4)simple-monitor
+https://extensions.gnome.org/extension/3891/simple-monitor/
 
 
 2.记一次win和ubuntu双系统的记录