In PureOS, I want to download and save an app (for example qemu) along with its dependencies and subdependencies for later offline installation. How can I do that?
You can of course directly wget packages from a repo. But I assume you want auto dependency resolution. How about this:
To later install them from a directory, you need to make sure to
- specify the path starting with / or ./ (or apt will assume a package name, not a path)
- list all packages so that it will not attempt to download dependencies
apt install ./mycache/*
- I did not test this specific scenario, but in general that should work
- only dependencies that are not already installed will be fetched
Stack Overflow won’t always be around, or up, so the answer should probably be posted inline:
--download-only flag to
apt install you can use, or the shortcut,
apt download, which will download the .deb files to the current directory. I tried it with the qemu package, and it downloaded the deb, but no dependencies. I assume that because PureOS comes with GNOME Boxes that I already have the dependencies; some testing is needed to be sure it fetches dependencies.
So, put shortly:
mkdir -p /my/apt/cache cd /my/apt/cache sudo apt clean # optional apt download $PACKAGE
Just like other apt operations, you can put multiple package names on the command line and it will fetch them all.