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I want to install mysql-server-5.5 in a new Debian Squeeze installation, but when I start to install it I get a warning that I don't see as being a requirement:

WARNING: The following essential packages will be removed.
This should NOT be done unless you know exactly what you are doing!

It looks like the upstart package will be installed to replace sysvinit. Will proceeding with the install cause damage? Can you help me understand why sysvinit needs to be removed for mysql-server to be installed? Is there a way to install mysql-server without removing sysvinit?

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The package mysql-server-5.5 is not available in the squeeze repos. Have you added repos for another version? Please post the contents of /etc/apt/sources.list – theotherreceive Nov 3 '12 at 17:05
Yes, Ubuntu 12.04 LTS Precise Pengolin. deb precise main restricted universe multiverse along with the deb-src entry. – E-rich Nov 3 '12 at 18:23
up vote 2 down vote accepted

Ubuntu uses upstart by default, Debian does not, hence the problem with dependencies when you try to mix their packages. Mysql 5.5 is available in debian wheezy, you may have better luck using those packages.

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