Cara memperbaiki error Could not retrieve mirrorlist http://mirrorlist.centos.org pada Centos 7

#!/bin/bash

# Nama file repositori dan log file
REPO_FILE="/etc/yum.repos.d/CentOS-Vault.repo"
LOG_FILE="repo_update.log"

# Backup file repositori yang ada
echo "Membackup file repositori yang ada..." | tee -a $LOG_FILE
mkdir -p /etc/yum.repos.d-backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d-backup/ | tee -a $LOG_FILE

# Menambahkan repositori CentOS 7 arsip
echo "Menambahkan repositori CentOS 7 arsip ke $REPO_FILE..." | tee -a $LOG_FILE
cat <<EOF > $REPO_FILE
[base]
name=CentOS-7 - 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

[updates]
name=CentOS-7 - 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

[extras]
name=CentOS-7 - 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

[centosplus]
name=CentOS-7 - Plus
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
EOF

# Perbarui cache yum
echo "Memperbarui cache yum..." | tee -a $LOG_FILE
yum clean all | tee -a $LOG_FILE
yum makecache | tee -a $LOG_FILE

echo "Selesai! Lihat $LOG_FILE untuk detail perubahan."

vi script-update-repo.sh

chmod +x script-update-repo.sh

./script-update-repo.sh