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I need to automatically install a package with its config file already present on the server.

I'm looking for something like :

apt-get install --yes --force-yes --keep-current-confs mysql-server

Probably a dumb question but I can't file such option. Will the mighty Serverfault community help me ?

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2 Answers 2

up vote 6 down vote accepted

Found the answer on Raphael Hertzog's Blog :

apt-get install -o Dpkg::Options::="--force-confold" --force-yes -y mysql-server

It's dpkg's role to configure, therefore to chose which conf file to keep.

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On current ubuntu systems you need a bit more:

export DEBIAN_FRONTEND=noninteractive ; apt-get dist-upgrade -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" --force-yes
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