A question about the two package managers in fedora

[Cisco Tissera]

Hello everyone,

For quite random reasons, I was wondering what would happen if I completely
removed yum, and only used dnf.
Is it possible to do that? or would it totally break the system?
Another question: why keep two package managers, and not switch to dnf and
just keep dnf?
Sorry if my questions might sound stupid, but I'm quite curious.
Thanks for any answer.
Best regards.
Francisco.

[Markus Schönhaber]

18.06.21, 12:43 +0200, Cisco Tissera:
> For quite random reasons, I was wondering what would happen if I completely
> removed yum, and only used dnf.
> Is it possible to do that? or would it totally break the system?
> Another question: why keep two package managers, and not switch to dnf and
> just keep dnf?

On a fresh install of F34 Server I see this:

# LANG=C dnf list installed *yum*
Installed Packages
yum.noarch                      4.7.0-1.fc34                   @updates

# rpm -ql yum
/usr/bin/yum
/usr/share/man/man8/yum.8.gz

# ls -l /usr/bin/yum
lrwxrwxrwx. 1 root root 5 13. Mai 16:35 /usr/bin/yum -> dnf-3*

So, there's pretty little "yummy" stuff there. And what is there is not
much more than a pointer to dnf.
It seems, the switch to dnf you asked about has basically already happened.

[Cisco Tissera]

Hello there,

Yes, the switch has happened indeed, since Fedora... 21?
The point I'm trying to make is, why keep yum, since the  switch to dnf has
already happened?
Even yum's plugins and extra utilities are still a thing.
Best regards.
Francisco.

On Fri, Jun 18, 2021 at 7:10 AM Markus Schönhaber <
[e-mail]> wrote:
> 18.06.21, 12:43 +0200, Cisco Tissera:
> > For quite random reasons, I was wondering what would happen if I
>
> completely
> > removed yum, and only used dnf.
> > Is it possible to do that? or would it totally break the system?
> > Another question: why keep two package managers, and not switch to dnf
>
> and
> > just keep dnf?
>
> On a fresh install of F34 Server I see this:
>
> # LANG=C dnf list installed *yum*
> Installed Packages
> yum.noarch                      4.7.0-1.fc34                   @updates
>
> # rpm -ql yum
> /usr/bin/yum
> /usr/share/man/man8/yum.8.gz
>
> # ls -l /usr/bin/yum
> lrwxrwxrwx. 1 root root 5 13. Mai 16:35 /usr/bin/yum -> dnf-3*
>
> So, there's pretty little "yummy" stuff there. And what is there is not
> much more than a pointer to dnf.
> It seems, the switch to dnf you asked about has basically already happened.
>
> --
> Regards
>   mks
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[Barry]

> On 18 Jun 2021, at 12:26, Cisco Tissera  wrote:
>
> 
> Hello there,
>
> Yes, the switch has happened indeed, since Fedora... 21?
> The point I'm trying to make is, why keep yum, since the  switch to dnf has already happened?

My guess is that it to do with a lot of code expecting yum and not dnf.
At work we use different versions of Centos and they all support yum, not all support dnf.
> Even yum's plugins and extra utilities are still a thing.

And the config is in /etc/yum.repos.d

Barry
> Best regards.
> Francisco.
> > On Fri, Jun 18, 2021 at 7:10 AM Markus Schönhaber  wrote:
> > 18.06.21, 12:43 +0200, Cisco Tissera:
> > > For quite random reasons, I was wondering what would happen if I completely
> > > removed yum, and only used dnf.
> > > Is it possible to do that? or would it totally break the system?
> > > Another question: why keep two package managers, and not switch to dnf and
> > > just keep dnf?
> >
> > On a fresh install of F34 Server I see this:
> >
> > # LANG=C dnf list installed *yum*
> > Installed Packages
> > yum.noarch                      4.7.0-1.fc34                   @updates
> >
> > # rpm -ql yum
> > /usr/bin/yum
> > /usr/share/man/man8/yum.8.gz
> >
> > # ls -l /usr/bin/yum
> > lrwxrwxrwx. 1 root root 5 13. Mai 16:35 /usr/bin/yum -> dnf-3*
> >
> > So, there's pretty little "yummy" stuff there. And what is there is not
> > much more than a pointer to dnf.
> > It seems, the switch to dnf you asked about has basically already happened.
> >
> > -- 
> > Regards
> >   mks
> > _______________________________________________
> > users mailing list -- [e-mail]
> > To unsubscribe send an email to [e-mail]
> > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]
> > Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
>
> users mailing list -- [e-mail]
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[Jonathan Billings]

On Fri, Jun 18, 2021 at 07:25:14AM -0400, Cisco Tissera wrote:
> Hello there,
>
> Yes, the switch has happened indeed, since Fedora... 21?
> The point I'm trying to make is, why keep yum, since the  switch to dnf has
> already happened?
> Even yum's plugins and extra utilities are still a thing.

The 'yum' package and executable on Fedora is just a placeholder.
/usr/bin/yum is just a symlink to dnf-3.  There is no legacy yum code
installed.  The package and symlink just exists for people who are
used to typing 'yum', or they use 3rd-party software that runs 'yum'
instead of 'dnf'.

You can remove the yum package, it won't change the way packages are
managed on Fedora.  It's just a helper package.

[Cisco Tissera]

Hello there,

I see, thanks for the explanation, I really appreciate it.
About yum being a placeholder, it totally makes sense.
I guess I'll remove yum then, since I've started with dnf, and because i am
going to be using dnf.
Thanks again.
Best regards.
francisco.

On Fri, Jun 18, 2021 at 9:25 AM Jonathan Billings 
wrote:
> On Fri, Jun 18, 2021 at 07:25:14AM -0400, Cisco Tissera wrote:
> > Hello there,
> >
> > Yes, the switch has happened indeed, since Fedora... 21?
> > The point I'm trying to make is, why keep yum, since the  switch to dnf
>
> has
> > already happened?
> > Even yum's plugins and extra utilities are still a thing.
>
> The 'yum' package and executable on Fedora is just a placeholder.
> /usr/bin/yum is just a symlink to dnf-3.  There is no legacy yum code
> installed.  The package and symlink just exists for people who are
> used to typing 'yum', or they use 3rd-party software that runs 'yum'
> instead of 'dnf'.
>
> You can remove the yum package, it won't change the way packages are
> managed on Fedora.  It's just a helper package.
>
> --
> Jonathan Billings 
> _______________________________________________
> users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct:
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives:
> https://lists.fedoraproject.org/archives/list/[e-mail]
> Do not reply to spam on the list, report it:
> https://pagure.io/fedora-infrastructure

[George N. White III]

On Fri, 18 Jun 2021 at 10:54, Cisco Tissera 
wrote:
> Hello there,
>
> I see, thanks for the explanation, I really appreciate it.
> About yum being a placeholder, it totally makes sense.
> I guess I'll remove yum then, since I've started with dnf, and because i
> am going to be using dnf.

This relatively new system (first install Fedora 29) has never had yum and
I have not missed it.