On Mon, Jul 27, 2020 at 8:09 PM Todd Zullinger <tmz@pobox.com> wrote:

The subsection "NEVRA Matching" lists the forms dnf accepts.
For kernel*-5.7.*, we're matching the name-[epoch:]version
form (the '[epoch:]' portion means it's optional to provide
the Epoch portion (that's the E in NEVRA¹).

So kernel* is the Name part and 5.7.* is the Version part in
the specification.  As both have globs in them, we look at
the Globs section which says:

    *      Matches any number of characters.

That's what allows the package-spec to match all the kernel
subpackages.  (In theory, you could list them all out using
the '{}' notation -- but I think that's either buggy or
incorrect documentation.  It likely relies on the shell's
brace expansion rather than dnf's.)

 
Ok I have a couple of questions:

1 ) 

I tried:
$ dnf repoquery --installed kernel*-5.6.*
kernel-0:5.6.10-300.fc32.x86_64
kernel-0:5.6.8-200.fc31.x86_64
kernel-core-0:5.6.10-300.fc32.x86_64
kernel-core-0:5.6.8-200.fc31.x86_64
kernel-devel-0:5.6.10-300.fc32.x86_64
kernel-devel-0:5.6.8-200.fc31.x86_64
kernel-headers-0:5.6.10-300.fc32.x86_64
kernel-modules-0:5.6.10-300.fc32.x86_64
kernel-modules-0:5.6.8-200.fc31.x86_64
kernel-modules-extra-0:5.6.10-300.fc32.x86_64
kernel-modules-extra-0:5.6.8-200.fc31.x86_64

Where is the extra 0 in " kernel-0 " coming from ? If you see the rpm -qa output the zero is not present there:

$ rpm -qa | grep ^kernel | grep '5\.6'

kernel-devel-5.6.10-300.fc32.x86_64
kernel-5.6.10-300.fc32.x86_64
kernel-headers-5.6.10-300.fc32.x86_64
kernel-core-5.6.10-300.fc32.x86_64
kernel-core-5.6.8-200.fc31.x86_64
kernel-modules-5.6.8-200.fc31.x86_64
kernel-5.6.8-200.fc31.x86_64

2) 

How do I know which is the epoch and the version and the release in NEVRA ? And are there any standard separators between them ?

  kernel-5.6.10-300.fc32.x86_64  

Which is what here ? I know the name is 'kernel' that one was easy. :-)



Thanks for your help. I want to use DNF wherever I can since it is the more standard way to do package queries.
 
--
Regards,
Sreyan Chakravarty