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Understanding various update and upgrade commands
12578
How do I upgrade to a newer version of Ubuntu?
56919
Best Way to Upgrade from WP 2.8 (!)?
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Will upgrading Windows 8 to 8.1 affect Ubuntu?
100135
What does "upgrade to 18.04" mean?
146622
What is a partial upgrade and when is it necessary?
33651
How to upgrade from Ubuntu 12.10 to 14.04
129917
Update Windows 8 Enterprise to Windows 8.1 Enterprise KMS activation
129223
Ubuntu upgrade from 17.04 to 18.04
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Upgrade to Ubuntu 13.10 from ISO image
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Transform to SRID 900913
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how to upgrade a single package in debian