Update linux.md

Clarify the build steps. The most important is that initialy "Create ..." and "Install ..." could be interpreted as "(User should) create/install ..." while it should mean "(To) create/install ... (do)".

docs/build-instructions/linux.md

@@ -30,23 +30,24 @@ Ubuntu LTS 12.04 64-bit is the recommended platform.
 
 If you have problems with permissions don't forget to prefix with `sudo`
 
-Create the atom application at `$TMPDIR/atom-build/Atom`:
+From the cloned repository directory:
 
-```sh
-script/build
-```
+ 1. Build:
 
-Install the `atom` and `apm` commands to `/usr/local/bin`:
+    ```sh
+    $ script/build
+    ```
+    This will create the atom application at `$TMPDIR/atom-build/Atom`.
+ 2. Install the `atom` and `apm` commands to `/usr/local/bin` by executing:
 
-```sh
-sudo script/grunt install
-```
+    ```sh
+    $ sudo script/grunt install
+    ```
+ 3. *Optionally*, you may generate a `.deb` package at `$TMPDIR/atom-build`:
 
-Generate a `.deb` package at `$TMPDIR/atom-build`: (*optional*)
-
-```sh
-script/grunt mkdeb
-```
+    ```sh
+    $ script/grunt mkdeb
+    ```
 
 Use the newly installed atom by restarting any running atom instances.