diff --git a/Linux/basic_cmd.md b/Linux/basic_cmd.md
index 61175bb..4b7382c 100644
--- a/Linux/basic_cmd.md
+++ b/Linux/basic_cmd.md
@@ -308,6 +308,19 @@ $ realpath example.txt
 /home/username/example.txt
 ```
 
+## how to navigate in a web page source code 
+
+- Wget: The non-interactive network downloader
+
+```
+ $ wget www.tandemlaw.be 
+```
+- search url inside index.html
+[Bashoneliners.com](bashoneliners.com)
+  
+```bash
+$ cat index.html | grep -o "https.*" |cut -d "\"" -f1 |sort | uniq
+```
 ## text editor
 - Nano: Nano's ANOther editor, an enhanced free Pico clone
 (simple text editor for noobies) 
@@ -320,7 +333,7 @@ $ realpath example.txt
 
 > $ vim
 
-> $ vim filename 
+> $ vim filename   
 
 # APT
 > $ apt install
@@ -358,3 +371,7 @@ $ realpath example.txt
 - dhclient > get ip
 - gnome networkmanager 
 - wpa_supplicant > encryption @ wifi
+
+# note : add HTOP picture (use f5)
+
+![htop](./img/htop.png)