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MigrationBot: Import from cypat.guide: docs/linux/application_updates/intro_application_updates.md

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Import from cypat.guide: docs/linux/application_updates/intro_application_updates.md

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Author(s): Matthias Lee (ml2322) <br /> Last Updated: 8-13-2025

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{| class="mw-collapsible mw-collapsed wikitable" style="width:100%"
! Recommended Prerequisites (click to expand)
|-
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None! This is an introductory article.

|}

=== What is Application Updates? ===

Application Updates simply refers to updating the software on the system.

=== Why is this important? ===

Keeping your software up to date is important, as it ensures that you are using the latest versions of all software. This makes sure that you have the latest security patches and therefore reduces the attack surface.

=== How to update packages ===

To update packages on Debian-based linux distros (Ubuntu, Mint, Debian, etc...), we use APT.

==== apt update ====

Before we can actually update the packages, we need to run <code>sudo apt update</code>. While counterintuitive, this does not update the packages themselves, it updates the package lists so that APT knows what to actually update. To get started, run:

<syntaxhighlight lang="text">user@system:~$ sudo apt update
...</syntaxhighlight>
==== apt upgrade ====

Now that our package lists are updated, we can actually update everything. To do this, we use the command: <code>sudo apt upgrade</code>. This will fetch and install the latest versions of all packages on the system, keeping you up to date with the latest security fixes.

<syntaxhighlight lang="text">user@system:~$ sudo apt upgrade
...</syntaxhighlight>
====== Further Reading ======

* https://linuxize.com/post/how-to-use-apt-command/

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MigrationBot: Import from cypat.guide: docs/linux/application_updates/intro_application_updates.md