Updated Template (markdown)

Template.md

@@ -1,17 +1,35 @@
-# (Message goes here)
+# "To run commands as another user, use su -c or sudo.
 
 ### Problematic code:
 
-    (Simple example of problematic code)
+    ./configure
+    make
+    su root
+    make install
 
 ### Correct code:
 
-    (Simple example of above code, only fixed)
+    ./configure
+    make
+    sudo make install  # or su -c 'make install' root
 
 ### Rationale:
 
-(An explanation of why the code is problematic and how the correct code is an improvement)
+`su` doesn't actually switch user. It starts a brand new shell, running as another user. You can't put `su foo` in a script to make the following command run as user `foo`. 
+
+Use `sudo -u username cmd` or `su -c cmd username` instead.
 
 ### Contraindications
 
-(Cases where the user may choose to ignore this warning, if any.)
+If you want to present the user with a root shell or when you're redirecting input, you can ignore this message:
+
+    until mycommand
+    do
+      echo "Failed. You will now get a root shell. Fix problem and exit to retry."
+      su
+    done
+
+or
+
+    exec < mycommands
+    su foo