Rephrase overview.rst

docs/overview.rst

@@ -2,10 +2,8 @@ Overview
 ^^^^^^^^
 
 snf-image-creator is a simple command-line tool for creating OS images. The
-original media from which the image is created, can be a block device or a
-regular file that represents a hard disk. Given a media file, snf-image-creator
-will create a snapshot for it and will run a number of system preparation
-operations on the snapshot, before the image is created.
+original media, the image is created from, can be a block device or a regular
+file that represents a hard disk.
 
 Snapshotting
 ============
@@ -13,12 +11,13 @@ Snapshotting
 snf-image-creator works on snapshots of the original media. Any changes made by
 the program do not affect the original media.
 
-Preparation
-===========
+Image Preparation
+=================
 
-Some of the system preparation operations are OS specific. snf-image-creator
-will use heuristics to detect the OS of the media and determine which
-operations should perform on it. The main purpose of running them is to:
+During the image creation, a number of system preparation operations are
+applied on the media snapshot. Some of those are OS specific. snf-image-creator
+will use heuristics to detect the OS and determine which operations to apply.
+Those operations will:
 
  * Shrink the image
  * Clear out sensitive user data (passwords, ssh keys, history files, etc.)
@@ -28,12 +27,14 @@ operations should perform on it. The main purpose of running them is to:
 Creation
 ========
 
-The program can either dump the image file locally or directly upload it to
-pithos and register it with `okeanos <http://www.okeanos.grnet.gr>`_.
+The program can either dump the image file locally or use
+`./kamaki <https://code.grnet.gr/projects/kamaki>`_ to directly upload and
+register it on a `Synnefo <https://code.grnet.gr/projects/synnefo>`_
+deployment.
 
 Image Format
 ============
 
-The images the program creates are in diskdump format. This is the recommended
-format for `snf-image <https://code.grnet.gr/projects/snf-image>`_, the Ganeti
-OS Definition used by `Synnefo <https://code.grnet.gr/projects/synnefo>`_.
+The extracted images are in diskdump format. This is the recommended format for
+`snf-image <https://code.grnet.gr/projects/snf-image>`_, the Ganeti OS
+Definition used by `Synnefo <https://code.grnet.gr/projects/synnefo>`_.