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I searched askubuntu and got many solution, many of which are very complicated and eats huge bandwidth like say building an off-line deb archive. Is there any manual way to save the installed updated and packages only, so that i can use them later to install if anything goes wrong and i have to make a fresh install.

Thanks in advance.

Aude Sapere

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up vote 1 down vote accepted

To download the programs only without installing them, you can use the -d option in apt-get like, for example, sudo apt-get -d install firefox. This will only download the packages and not install it.

The downloaded packages will be saved in /var/cache/apt/archives. You can copy them from there to some other location, and then if you ever need to install the programs, then you can copy them back.

If you have an offline computer separately that you want to install packages to, then you could try apt-offline. On the offline computer it generates a list of files that need to be downloaded to install a program, and you can then download those files (either manually or using apt-offline again) from a different computer and copy them back to install.

There is also a GUI for it called apt-offline-gui, which makes the process much more user-friendly.

The apt-offline GUI

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OK Thanks, so if I do an "apt-get -d install firefox" and then can i install it later with "apt-get install firefox" without internet. Can i similarly use "apt-get -d upgrade" and and later without internet "apt-get upgrade" ? – Mrinal9 Apr 10 '14 at 10:26
@drofart Yes. The -d option makes apt perform only the downloading part of whatever command you give it. – Hippo Apr 10 '14 at 10:31
Thanks Hippo, then i guess synaptic will be the best option for newbies like me, it has a option of "only download package files" – Mrinal9 Apr 10 '14 at 10:56

You can use Cube for that. It is a portable package manager and downloads packages in any computer with internet connection and installs it back for later use, offline. All of the downloaded packages will be located at cube/projects/[your-project]/data/packages directory.

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Or you can also share/give your installed apps / packages to other Linux compatible computer using its App Share

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