Easy Fix Missing mirrorlist http://mirrorlist.centos.org on CentOS 7

When running yum update or command that utilize the yum system, errors similar to the following are produced:

[root@localhost ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

If you’re encountering issues with the mirrorlist URL on CentOS 7, it could be due to several reasons, such as network connectivity problems, outdated system configuration, or temporary server issues. Here are some steps to troubleshoot and resolve the issue:

Check Internet Connectivity

Ensure that your system has a working internet connection. You can try pinging a reliable host, such as google.com:

ping -c 4 google.com

If there’s no response, check your network settings.

Copy the Current CentOS 7 Repo and Epel

Copy the current CentOS 7 repository file so that you can revert the changes if necessary:

cp -v /etc/yum.repos.d/CentOS-Base.repo{,-backup}
cp -v /etc/yum.repos.d/epel.repo{,-backup}

Note: Your CentOS 7 base repository may have a different name. The above filename “CentOS-Base.repo” is only used as an example.

Edit Centos Base Repository

Edit the /etc/yum.repos.d/CentOS-Base.repo file using a command line text editor
Paste in the following configuration:

[base]
name=CentOS-7.9.2009 - Base
baseurl=http://vault.centos.org/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
#released updates
[updates]
name=CentOS-7.9.2009 - Updates
baseurl=http://vault.centos.org/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
# additional packages that may be useful
[extras]
name=CentOS-7.9.2009 - Extras
baseurl=http://vault.centos.org/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
# additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-7.9.2009 - CentOSPlus
baseurl=http://vault.centos.org/7.9.2009/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=0
metadata_expire=never
 
#fasttrack - packages by Centos Users
[fasttrack]
name=CentOS-7.9.2009 - Contrib
baseurl=http://vault.centos.org/7.9.2009/fasttrack/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=0
metadata_expire=never

Save the file and exit.

Edit Epel Repository

Edit /etc/yum.repos.d/CentOS.repo, Paste in the following configuration.

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
metadata_expire=never
 
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/$basearch/debug
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
metadata_expire=never
 
[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/SRPMS
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
metadata_expire=never

Clean Cache

Run the following commands:

yum clean all && yum makecache
yum check-update

Easy Fix Missing mirrorlist http://mirrorlist.centos.org on CentOS 7

Check Internet Connectivity

Copy the Current CentOS 7 Repo and Epel

Edit Centos Base Repository

Edit Epel Repository

Clean Cache

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