Update CSS of the main page

index.org

@@ -5,6 +5,7 @@
 
 #+HTML_HEAD: <link rel="stylesheet" type="text/css" href="css/style.css"/>
 #+HTML_HEAD: <script type="text/javascript" src="js/script.js"></script>
+#+HTML_HEAD: <style> #content {margin-left:0;} </style>
 :END:
 
 Welcome to my research pages.
@@ -19,6 +20,14 @@ Welcome to my research pages.
          (shell-command (concat "git submodule deinit -f " path)))
 #+end_src
 
+* Change submodule url                                              :noexport:
+First delete the submodule using
+#+begin_src bash
+  git rm --cache submodule-name
+#+end_src
+
+Then add a new submodule with the updated url.
+
 * Update CSS and JS                                                 :noexport:
 #+begin_src bash :results none
   cd js && cat jquery.min.js jquery.stickytableheaders.min.js bootstrap.min.js readtheorg.js > script.js