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I am in the process of upgrading from Ubuntu 11.04 to 11.10 , but I've experienced the same error for the second time now after trying to upgrade for a second time.

I used the Update Manager program to first update all my packages. After this is complete I begin the Ubuntu upgrade process which stalls at the following point in the terminal:

installing new version of config file /etc/init.d/postgresql

The screen flickers continuously as if the update program is stuck in an infinite loop. I waited for over 30 minutes at this step to make sure but there was no progress.

Anyone know what my issue may be?

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First thing to do is look at every log file you can think of. PostgreSQL logs, any upgrade/install log being written by the updater (see docs, google to find it if it isn't in /var/log; could be in /tmp or /root), syslog, etc. check 'top' to see if there's anything doing lots of work. –  Craig Ringer May 25 '13 at 4:01
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