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license info of a deb package

I am trying to get license information of uninstalled deb packages.

dpkg --info <package-name>.deb does not give th开发者_Go百科at information.

Is there any command in ubuntu which will give this info?

(In rpm world rpm -qpi gives that info)


There's no simple command that I know of. You can do something like this:

dpkg-deb --fsys-tarfile foo.deb |tar -xvO ./usr/share/doc/foo/copyright

This prints the file to standard output.

Edit Hmm, that sounds hard. After a quick perusal of the apt cache on my Debian system, I found some phrases that might be useful:

  • "GNU General Public License"
  • "the above copyright notice and this permission notice", making sure you unwrap lines first
  • "/usr/share/common-licenses/*"

    This seems to be the closest to a standard license you'll get, but be careful since often the packaging is under a common-license, but the package contents are under a separate license.

  • ^License: MPL-1.1 | GPL-2+ | Apache-2.0

However, some packages (ImageMagick) simply have a free-form license in the copyright file that doesn't really conform to any stock license, except that someone considered it DFSG-approved.

Update 2012: This is beginning to change, as the debian/copyright file is now required to be machine-interpretable, so you can look forward to this in the future.

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