Upgrading MediaWiki 1.8.4 to 1.9

I've just upgrade my MediaWiki from 1.8.4 to 1.9.3. Here is step-by-step instruction how I upgrade the Wiki.

1. Make a full backup of the database.
   From shell,
   

   mysqldump -u wikidbuser -p --opt
       --databases wikdb > wikidb-backup.sql

   If you don't have insufficient privilege to MySQL database, you might get following errors:
   

   mysqldump: Got error: 1044: Access denied for
   user 'wikidbuser'@'localhost' to database 'wikidb'
   when using LOCK TABLES

   You may have to use MySQL root account to backup or without --opt option. Since the MediaWiki installation, I've actually used MySQL so I've done full backup.
   

   mysqldump -u root -p --add-drop-table
       --all-databases > backup.sql

   Of course, you can also use phpMyAdmin to all the work.
2. Make a backup the MediaWiki directory.
   Make sure at least you backup AdminSettings.php file, LocalSettings.php file, images folder, and extensions directory. I've just done full backup.
   

   cp -a /var/www/mediawiki
       ~/Backup/mediawiki.backup

3. Upgrading WikiMedia
   Getting the newest WikiMedia source
   

   wget http://mirror/mediawiki-1.9.3.tar.gz
   tar xvfz mediawiki-1.9.3.tar.gz

   Updating files
   

   /bin/cp -R mediawiki-1.9.3.tar.gz /var/www/mediawiki

4. Run maintenance script.
   

   cd /var/www/mediawiki/maintenance
   php update.php

   I've just renamed LocalSettings.php and re-run the web installation. And move back LocalSettings.php file. Check Special:Version for MediaWiki version.
5. Copy back extensions and images folder if necessary.

I've had problem with file permission on MediaWiki files which were own by apache:apache and I was installing from user account. If you have root account, it shouldn't be a problem.