I have done this a few times.  Upgraded from 2.0 beta 2 to 2.0 beta 4 and then to 2.0.1.  I have OTRS installed in /usr/share running on Debian.  Here is the process I used to do the upgrades.
  1. Untar the 2.0.1 tar ball into /usr/share.
  2. Run otrs/scripts/DBUpdate-to-2.0.mysql.sql
    1. mysql -f -u root -p otrs < /usr/share/otrs/scripts/DBUpdate-to-2.0.mysql.sql
    2. I used the -f to display errors but ignore them.  This way you ignore errors about creating tables that already exist.
  3. Run otrs/bin/SetPermissions.sh
  4. I had to make a few permission adjustments after this but do not remember what I had to change at the moment.
The only issue I have at the moment is a problem with merging tickets.

Hope this helps.
Ken Kilgore
----------------------------------------------
When life hands you lemons just grab the salt and pass the Tequila.


Sandip Bhattacharya wrote: 
On Friday 05 Aug 2005 6:27 am, Rob Cas wrote:
  
Hi,

Does anybody have any advice on upgrading from 2.0b4 to 2.0.1?

- Were there database schema changes?
- Can I simply patch the changed files, or is a full re-install
recommended?
- Any gotchas I should be aware of...

    

I would like to know the same for upgrading from beta6. I notice there arent 
any upgrade instructions for people upgrading from the beta.

- Sandip