Add search through man pages

source/C/command_line.rst

@@ -10,7 +10,7 @@ An exhaustive tutorial on the command line is a bit beyond the scope of the manu
    
    man df
 
-This will show you the user manual for the df command containing and explanation of the command and other useful information. For example is the -h option gives a human readable output.
+This will show you the user manual for the df command containing and explanation of the command and other useful information. For example is the -h option gives a human readable output. If the manual is way to long you can press the :kbd:`/` key and type in what you want to search for.
 
 .. code::
   
@@ -51,3 +51,4 @@ If you need to edit a text file from the command line the easiest editor include
 where you replace [file] with the file you want to edit.
 
 If you want to stop something running in the terminal press :kbd:`Control +C`.
+