user_guide_src/source/installation/upgrade_162.rst
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Upgrading from 1.6.1 to 1.6.2
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Before performing an update you should take your site offline by
replacing the index.php file with a static one.
Step 1: Update your CodeIgniter files
=====================================
Replace these files and directories in your "system" folder with the new
versions:
- system/codeigniter
- system/database
- system/helpers
- system/language
- system/libraries
.. note:: If you have any custom developed files in these folders please
make copies of them first.
Step 2: Encryption Key
======================
If you are using sessions, open up application/config/config.php and
verify you've set an encryption key.
Step 3: Constants File
======================
Copy /application/config/constants.php to your installation, and modify
if necessary.
Step 4: Mimes File
==================
Replace /application/config/mimes.php with the dowloaded version. If
you've added custom mime types, you'll need to re-add them.
Step 5: Update your user guide
==============================
Please also replace your local copy of the user guide with the new
version.