Merge pull request DjangoGirls#1393 from jhodgdon-drp/patch-10

Add info on command help

Author: magul

en/intro_to_command_line/README.md

@@ -149,6 +149,24 @@ You'll probably see something similar on your machine. Once you open the command
 
 ---
 
+### Learn more about a command
+
+Many commands you can type at the command prompt have built-in help that you can display and read! For example, to learn more about the current directory command:
+
+<!--sec data-title="Command help: OS X and Linux" data-id="OSX_Linux_pwd" data-collapse=true ces-->
+
+OS X and Linux have a `man` command, which gives you help on commands. Try `man pwd` and see what it says, or put `man` before other commands to see their help. The output of `man` is normally paged. Use the space bar to move to the next page, and `q` to quit looking at the help.
+
+<!--endsec-->
+
+
+<!--sec data-title="Current directory: Windows" data-id="windows_cd" data-collapse=true ces-->
+
+Adding a `/?` suffix to most commands will print the help page. You may need to scroll your command window up to see it all. Try `cd /?`.
+
+<!--endsec-->
+
+
 ### List files and directories
 
 So what's in it? It'd be cool to find out. Let's see:
@@ -416,6 +434,7 @@ move              | mv                       | move file                  | **mo
 mkdir             | mkdir                    | create a new directory     | **mkdir testdirectory**
 rmdir (or del)    | rm                       | delete a file              | **del c:\test\test.txt**
 rmdir /S          | rm -r                    | delete a directory         | **rm -r testdirectory**
+[CMD] /?          | man [CMD]                | get help for a command     | **cd /?** (Windows) or **man cd** (Mac OS / Linux)
 
 These are just a very few of the commands you can run in your command line, but you're not going to use anything more than that today.