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My Ubuntu 12.04 did some "unattended-upgrades" by itself and increased too much disk space. How can I revert this?

marked as duplicate by Takkat, Mitch Aug 11 '14 at 19:07

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Disabling security updates will unnecessarily expose your server to known and published security risks.

It is therefore strongly recommended to always install security updates.

To clean up hard disk space after having installed these updates there are much better methods as outlined here:

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