yum and dnf update failed

how to solve both problem ?

there is only 1 problem
yum was replaced with dnf; running yum just points to dnf so you're running the same thing

are you using any custom repo or just the default?
did you try dnf clean all then try to update again?
could be some corrupt info from the power outage

yum was replaced with dnf; running yum just points to dnf so you're running the same thing

\
ok, what good is dnf than yum ?

are you using any custom repo or just the default?

default , anyway to verify it ?

did you try dnf clean all then try to update again?

tried both dnf clean packages and dnf clean all , still the same thing!

could be some corrupt info from the power outage

any command can ask Centos to find it out and fix it accordingly ?

I also found CentOS apps update page has this:

ok, what good is dnf than yum ?

https://en.wikipedia.org/wiki/DNF_(software)

default , anyway to verify it ?

if you haven't edited the repo list manually then i wouldn't worry about that

any command can ask Centos to find it out and fix it accordingly ?

rename the cache folder
mv /var/cache/dnf /var/cache/dnf-old
try dnf update again

rename the cache folder
mv /var/cache/dnf /var/cache/dnf-old
try dnf update again

this seems this kind of dnf problem will happen quite reqularily ?

and how to solve the app store problem?

mv /var/cache/dnf /var/cache/dnf-old
try dnf update again

move-dnf-cache.jpg

mv /var/cache/dnf /var/cache/dnf-old
try dnf update again

still can't !


and for the CentOS app store for any system update I can't download and the error is :


I tried to yum the package I highlight and the download of package doesn't work.
same cache message!

What is the output of running

dnf repolist
cat /etc/yum/pluginconf.d/product-id.conf 
cat /etc/yum/pluginconf.d/subscription-manager.conf

Select allOpen in new window

?

If you have "enabled=1" in either of those files, edit them to make it "enabled=0" instead.

Suggest you also repeat renaming the cache folder and once you've done that, run "dnf clean all" again.

dnf repolist

cat /etc/yum/pluginconf.d/product-id.conf
cat /etc/yum/pluginconf.d/subscription-manager.conf

no such file

Hm, ok.

Did you rename the cache folder and then run "dnf clean all" again?

If you've done that and it's still not working then I'll have to look into this some more tomorrow as I'm out of ideas.

Did you rename the cache folder and then run "dnf clean all" again?

yes

If you've done that and it's still not working then I'll have to look into this some more tomorrow as I'm out of ideas.

tks.

is it CentOS problem ?

do you see what the error message on the GUI when I go to apps store? is it means anything to you ?

No. My CentOS VM has never had this problem in over a year of frequent use.

I think you damaged something with improper shutdowns during power loss. Most of the suggestions that have been made in this thread are attempts to repair the yum/dnf systems.

Because both yum and dnf cache things separately I think you need to remove both caches and clean both of them:

rm /var/cache/dnf
rm /var/cache/yum
yum clean all
dnf clean all

Do all those and try again. If you're still getting errors then the next step is a full rpm rebuild which is a bit complicated. :)

Let's get the command line working first and then see if there are still any GUI issues.

rm /var/cache/dnf
rm /var/cache/yum

no such  directory.

dnf update

seems can't remove that package:

Yeah that looks like you've pulled down only some of what you need. Normally that happens when someone just copies a repo and tries to install from that, but from your repolist earlier you're picking up all the centos repos correctly.

At this point it looks like an issue with that rpm specifically - your yum/dnf is doing exactly what it should when it finds a repo in module format without everything it needs to install the module.

You'll need someone smarter than I am to fix this one, sorry.

No. My CentOS VM has never had this problem in over a year of frequent use.

what CentOS version it is ?

I update it regularly, currently CentOS release 7.8.2003 (Core), with kernel 3.10.0-1127.el7.x86_64 #1 SMP from 31 March 2020.

CentOS release 7.8.2003 (Core),

centOS 7 ?

I am using CentOS 8, I tried to download another ISO and testing it ! and it seems ISO different but I am now having the same problem.

rm /var/cache/dnf
rm /var/cache/yum

I am using CentOS8 and that's why only you got this !

I am using CentOS7 now and it seems the apps store working well

now one problem, can't run xclock and xeye but Xwindows system installed, why is it
??

New problem = new question :)

ok. I fixed myself, the method of enabling xwindows for CentOS 8 and 7 is very different.