Alright, let’s end the confusion and get your CentOS Stream 8 repos working.
Here’s the deal as of mid-2026:
🚨 CentOS Stream 8 is EOL (End of Life)
As of June 2024, CentOS Stream 8 has reached end of life.
Official mirrors are being removed or archived, and that’s why you keep getting 404 Not Found on all repo URLs.
This is not a configuration bug on your part—the repos themselves are GONE.
🟠 What are your options now?
Option 1: Migrate to CentOS Stream 9 or Rocky/AlmaLinux 8/9
- Recommended.
- Download a Rocky or AlmaLinux minimal ISO, or CentOS Stream 9 cloud image, and migrate or rebuild your instance.
- Both Rocky and AlmaLinux have active 8.x and 9.x repos.
Option 2: Use Vault/Archive Repos (Not Recommended for Production!)
CentOS does maintain an archive of EOL repos:
You can use the CentOS vault. These repos will never be updated again and may disappear at any time.
How to use CentOS Vault Archive for Stream 8:
Replace your AppStream and BaseOS repo files with:
[baseos]
name=CentOS Stream 8 - BaseOS - Vault
baseurl=http://vault.centos.org/8-stream/BaseOS/x86_64/os/
enabled=1
gpgcheck=0
[appstream]
name=CentOS Stream 8 – AppStream – Vault baseurl=http://vault.centos.org/8-stream/AppStream/x86_64/os/ enabled=1 gpgcheck=0
(You can put both blocks in one file, or in separate files.)
1. Create the file:
sudo tee /etc/yum.repos.d/CentOS-Stream-Vault.repo > /dev/null << 'EOF'
[baseos]
name=CentOS Stream 8 – BaseOS – Vault baseurl=http://vault.centos.org/8-stream/BaseOS/x86_64/os/ enabled=1 gpgcheck=0
[appstream]
name=CentOS Stream 8 – AppStream – Vault baseurl=http://vault.centos.org/8-stream/AppStream/x86_64/os/ enabled=1 gpgcheck=0 EOF
2. Clean & try:
sudo dnf clean all
sudo dnf makecache
sudo dnf update
⚠️ IMPORTANT: Using Vault/EOL is NOT SAFE for Production!
- No security updates.
- No bugfixes.
- Only use for recovery, migration, or as a very short-term solution.
🚀 Best Practice: Migrate ASAP
- Start planning to rebuild your server on:
- CentOS Stream 9 (if you want to stay close to RHEL)
- Rocky Linux 8/9 (drop-in replacement for CentOS 8/9)
- AlmaLinux 8/9 (also RHEL-compatible)
- Or Oracle Linux 8/9 (free as well)
If you need a Rocky or AlmaLinux repo file, or a migration script, let me know!
Try the Vault repo above and you’ll get your yum/dnf working again for now.
If you want a one-liner to convert your server to Rocky or Alma, I can give that as well!
You have two issues now:
- Repo listed more than once:
You have duplicate[baseos]and[appstream]definitions in multiple.repofiles. - Still using wrong (404) URL:
You are still trying to reachmirror.stream.centos.org/CentOS-Stream-8/AppStream/x86_64/os/, which is not available.
Let’s Fix Both Issues in 3 Steps
🛑 Step 1: Remove/Disable All Old or Wrong CentOS 8 Stream Repo Files
First, move all default CentOS Stream repo files out of /etc/yum.repos.d to keep only your Vault repo:
cd /etc/yum.repos.d
sudo mkdir backup-old-repos
sudo mv CentOS-Stream-* backup-old-repos/
Now your only active repo should be your custom/vault one.
📝 Step 2: Add Only the Vault Repo
Create one file for both AppStream and BaseOS Vault repos:
sudo tee /etc/yum.repos.d/CentOS-Stream-Vault.repo > /dev/null << 'EOF'
[baseos]
name=CentOS Stream 8 – BaseOS – Vault baseurl=http://vault.centos.org/8-stream/BaseOS/x86_64/os/ enabled=1 gpgcheck=0
[appstream]
name=CentOS Stream 8 – AppStream – Vault baseurl=http://vault.centos.org/8-stream/AppStream/x86_64/os/ enabled=1 gpgcheck=0 EOF
🧹 Step 3: Clean and Retry
sudo dnf clean all
sudo dnf makecache
sudo dnf update
Expected Result
- No more duplicate repo warnings
- No more 404 errors (because Vault is still available)
- You will see packages update (from vault — but again, only old/EOL packages)
💡 Optional: See Only Active Repos
You can verify which repos are enabled with:
dnf repolist
🚨 Final Reminder
- These vault repos are for EOL systems — OK for migration or short-term, but no security updates.
- For long-term, please migrate to Rocky/AlmaLinux or CentOS Stream 9.
Let me know if you want a one-liner script to migrate this system to Rocky or AlmaLinux 8 without reinstalling!
