[Bug 710038] Re: package mysql-server-5.1 5.1.41-3ubuntu12.8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 20

[Serge Hallyn]

Thanks for reporting this bug and helping to make Ubuntu better.

The /var/log/daemon.log from your system suggests that mysql is
insisting that you set initial passwords before proceeding.  It would
like you to do:

/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h lturnbow-laptop password 'new-password'

Hopefully these steps will be sufficient to allow updates to proceed
again.  Please let us know how it goes.

** Changed in: mysql-dfsg-5.1 (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/710038

Title:
  package mysql-server-5.1 5.1.41-3ubuntu12.8 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 20