I want to install the "file" package using apt, since my Docker container is missing the file command. Before installing, I'm checking the package details (see below).
How can I see the date these packages were released/updated? Their descriptions say that they are supported for 5 years, but that makes no sense, when I cannot see when they were released/updated?
Also, why is apt listing two "file" packages? Which one of those would be installed, when I run apt install file?
root@eca1fcd5655a:/mnt/dotnetcore# apt show -a file
Package: file
Version: 1:5.32-2ubuntu0.3
Priority: important
Section: utils
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Christoph Biedl <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 81.9 kB
Depends: libc6 (>= 2.4), libmagic1 (= 1:5.32-2ubuntu0.3)
Homepage: http://www.darwinsys.com/file/
Task: minimal
Supported: 5y
Download-Size: 22.1 kB
APT-Sources: http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
Description: Recognize the type of data in a file using "magic" numbers
Package: file
Version: 1:5.32-2
Priority: important
Section: utils
Origin: Ubuntu
Maintainer: Ubuntu Developers <[email protected]>
Original-Maintainer: Christoph Biedl <[email protected]>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 81.9 kB
Depends: libc6 (>= 2.4), libmagic1 (= 1:5.32-2)
Homepage: http://www.darwinsys.com/file/
Task: minimal
Supported: 5y
Download-Size: 22.1 kB
APT-Sources: http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
Description: Recognize the type of data in a file using "magic" numbers
The five-year support term applies to supported packages in Ubuntu LTS releases as a whole; when individual packages are released or updated doesn’t matter. Packages in the main repository receive publicly-available security updates for five years after the initial release of the distribution.
To see the latest changes to a package, look at its changelog:
zcat /usr/share/doc/${package}/changelog.Debian.gz | head -n 20
In this case, /usr/share/doc/file/changelog.Debian.gz.
You can also view a changelog without installing the package by using apt changelog:
apt changelog file
or look at the release information on the package’s page on Launchpad.
apt show -a lists two packages in your case because there are two versions available, one in the main repository, and another in the updates repository. The version which will be installed is the greater of the two, the version from the updates repository.
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