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I have two general questions how to show updates content and how to make partial update for example I want to update only nginx and don't touch other environment.

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up vote 1 down vote accepted

The more traditional way to show upgrades without running them is apt-get upgrade -s

Another useful tool is apt-show-versions which will show "upgradeable" in the 2nd field if it needs an upgrade.

As with SvW's post, run apt-get update before both.

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To display list of available upgrades:

apt-get update
apt-get upgrade 

and hit n to not actually upgrade.

apt-get changelog <packagename> 

will list the changelog, if available.

To upgrade just one package:

apt-get install <packagename>

will install or upgrade just this package.

Note however that this might fail if an update is dependent on other updated packages.

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