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You're reading from  Mastering Ubuntu Server - Fourth Edition

Product typeBook
Published inSep 2022
PublisherPackt
ISBN-139781803234243
Edition4th Edition
Tools
LinuxUbuntu Server
Concepts
Servers
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Author (1)
Jay LaCroix
Jay LaCroix
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Jay LaCroix

Jeremy "Jay" LaCroix is a technologist and open-source enthusiast, specializing in Linux. He has a net field experience of 20 years across different firms as a Solutions Architect and holds a master's degree in Information Systems Technology Management from Capella University. In addition, Jay also has an active Linux-focused YouTube channel with over 250K followers and over 20M views, available at LearnLinuxTV, where he posts instructional tutorial videos and other Linux-related content. He has also written Linux Mint Essentials and Mastering Linux Network Administration, published by Packt Publishing.
Read more about Jay LaCroix

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Backing up and restoring Debian packages

As you maintain your server, your list of installed packages will grow. If, for some reason, you needed to rebuild your server, you would need to reproduce exactly what you had installed before, which can be a pain. It’s always recommended that you document all changes made to your server via a change control process, but, at the very least, keeping track of which packages are installed is an absolute must. In some cases, a server may only include one or two extra packages in order to meet its goal, but, in other cases, you may need an exact combination of software and libraries in order to get things working like they were. Thankfully, the dpkg command allows us to export and import a list of packages to install.

To export a list of installed packages, we can use the following command:

dpkg --get-selections > packages.list

This command will dump a list of package selections to a standard text file. If you open it, you...

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Mastering Ubuntu Server - Fourth Edition
Published in: Sep 2022Publisher: PacktISBN-13: 9781803234243
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Jay LaCroix

Jeremy "Jay" LaCroix is a technologist and open-source enthusiast, specializing in Linux. He has a net field experience of 20 years across different firms as a Solutions Architect and holds a master's degree in Information Systems Technology Management from Capella University. In addition, Jay also has an active Linux-focused YouTube channel with over 250K followers and over 20M views, available at LearnLinuxTV, where he posts instructional tutorial videos and other Linux-related content. He has also written Linux Mint Essentials and Mastering Linux Network Administration, published by Packt Publishing.
Read more about Jay LaCroix

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