rpm-ostree Toolkit — Fedora Atomic / Bazzite Manager

Immutable OS management for Fedora Atomic / Bazzite — rpm-ostree layering, rollbacks, rebasing, system upgrades

rpm-ostree Toolkit

Manage Fedora Atomic / Bazzite immutable OS through rpm-ostree layering, rollbacks, and rebasing.

When to Use

• User asks about system updates, rollbacks, or package management on immutable OS
• Installing packages on Bazzite / Fedora Silverblue / Kinoite
• Rebase to new deployment or track different remote
• Check deployment history or pending updates
• Troubleshoot rpm-ostree conflicts or overlay issues

Prerequisites

• rpm-ostree installed (default on Fedora Atomic / Bazzite)
• Root or wheel privileges for rpm-ostree commands

Core Concepts

rpm-ostree manages an immutable base filesystem + layered packages. Unlike dnf, changes require a deployment reboot.

Immutable base → Layered packages → Reboot to apply

Commands Reference

System Status

bash

# Current deployment info
rpm-ostree status

# Show only current deployment
rpm-ostree status --json | python3 -c "
import json,sys
d=json.load(sys.stdin)
deployments = d.get('deployments', [])
if deployments:
    c = deployments[0]
    print(f\"OS: {c.get('osname','?')}\")
    print(f\"Version: {c.get('version','?')}\")
    print(f\"Base: {c.get('base-commit','?')[:12]}\")
    print(f\"Booted: {c.get('booted',False)}\")
    print(f\"Layered: {len(c.get('requested-packages',[]))} packages\")
    print(f\"Pending: {len(c.get('requested-local-packages',[]))} local pkgs\")
"

# Check for available updates
rpm-ostree upgrade --check 2>&1

# Pending transactions
rpm-ostree dbus-xml 2>/dev/null | head -5

Installing Packages

bash

# Install a package (creates new layer)
rpm-ostree install <package>

# Install multiple packages
rpm-ostree install gh vim tmux htop

# Install from URL (RPM)
rpm-ostree install https://example.com/package.rpm

# Overlay from local RPM
rpm-ostree overlay /path/to/package.rpm

Removing Packages

bash

# Remove a layered package
rpm-ostree uninstall <package>

# Remove multiple
rpm-ostree uninstall package1 package2

# Remove all overlays and reset to base
rpm-ostree override reset

System Updates

bash

# Check for updates (no apply)
rpm-ostree upgrade --check

# Apply update (requires reboot)
rpm-ostree upgrade

# Apply and reboot
rpm-ostree upgrade && systemctl reboot

Rollbacks

bash

# Rollback to previous deployment
rpm-ostree rollback

# List all deployments
rpm-ostree status

# Pin current deployment (prevent GC)
rpm-ostree pin

# Unpin
rpm-ostree pin --remove

Rebasing

bash

# Rebase to different remote/branch
rpm-ostree rebase fedora:fedora/40/x86_64/silverblue

# Rebase to Bazzite
rpm-ostree rebase ostree-image-signed:docker://ghcr.io/ublue-os/bazzite:stable

# Cancel pending rebase
rpm-ostree rebase --cancel

# Check pending rebase
rpm-ostree status | head -5

Overlays & Overrides

bash

# Override a base package with specific version
rpm-ostree override replace <rpm-url>

# Remove a package from base (create exclude)
rpm-ostree override remove <package>

# Reset all overrides
rpm-ostree override reset

Kernel Management

bash

# List available kernels
rpm-ostree kdump list 2>/dev/null

# Current kernel args
rpm-ostree kargs

# Modify kernel args
rpm-ostree kargs --append=nvidia-drm.modeset=1

# Reset kernel args to default
rpm-ostree kargs --reset

Cleaning Up

bash

# Remove old deployments (keep 2)
rpm-ostree cleanup -rp

# Remove only pending deployments
rpm-ostree cleanup -p

# Remove cached data
rpm-ostree cleanup -m

Conflicts & Troubleshooting

bash

# When package conflicts with base
rpm-ostree override replace <url>  # replace the conflicting package

# When layering fails
rpm-ostree cancel  # cancel pending transaction

# When deployment is corrupted
rpm-ostree rollback  # boot into previous

# Check transaction log
journalctl -u rpm-ostreed --since "1 hour ago" --no-pager | tail -30

Common Tasks

Install GitHub CLI on Bazzite

bash

rpm-ostree install gh
# Reboot to apply
systemctl reboot

Rebase from Silverblue to Bazzite

bash

rpm-ostree rebase ostree-image-signed:docker://ghcr.io/ublue-os/bazzite:stable
systemctl reboot

Check if update needed

bash

# Returns exit code 0 if updates available, 1 if not
if rpm-ostree upgrade --check 2>&1 | grep -q "Upgrade available"; then
  echo "Updates available"
else
  echo "System is up to date"
fi

Important Notes

• Every layering change requires reboot to take effect
• Rollback is instant — just boot into previous deployment
• No partial updates — the entire base is atomic
• rpm-ostree install ≠ dnf install — layered, not mutable
• Use flatpak for GUI apps, rpm-ostree for CLI/system packages
• Bazzite uses ublue-os signing keys