CentOS is out of date – fix can be sort of fixed for yum update and yum upgrade

CentOS 7 broke. Redhat destroyed it further. Now we’ve moved on to Debian, Ubuntu (that we always had), and Alma Linux.

These are the clues:

yum update fails

yum upgrade fails

Repos give 404s, for example:

http://mirror.centos.org/centos/7/sclo/x86_64/rh/repodata/repomd.xml: [Errno 14] HTTP Error 404 – Not Found

But what if you still have legacy CentOS 7 around and it doesn't want to update? You could try this:

sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

Strait after making these changes, try updating or installing a few files again (e.g. yum install mc).

Cannot find a valid baseurl for repo: centos-sclo-sclo

mv /etc/yum.repos.d/CentOS-SCLo-scl.repo /root

or

cd /etc/yum.repos.d
mv CentOS-SCLo-scl.repo /root

You will cry at Stack

• https://serverfault.com/questions/904304/could-not-resolve-host-mirrorlist-centos-org-centos-7

sqlite problems

Disable that bad repo

yum-config-manager --disable centos-sclo-rh
yum-config-manager --disable centos-sclo-sclo

Maybe try this if it fails again:

yum remove sclo-php55-php-pecl-imagick

Package wbm-virtual-server-7.20.1.gpl-1.noarch.rpm is not signed

yum upgrade --nogpgcheck