Welcome to AstrOS

Why AstrOS?

Immutable base

/usr ships as a signed, read-only dm-verity image. The base system can’t be altered — not by you, not by anything else.

A/B updates

systemd-sysupdate fetches and applies signed image updates atomically, keeping the previous version around for rollback.

Verified boot

Unified Kernel Images are signed and measured, sealed against your TPM chip (PCR11).

Full-disk encryption

The btrfs root holding /home and /var is encrypted and unlocked automatically via TPM2.

COSMIC desktop

The modern Rust-based desktop from System76, tightly integrated

Container ready

Install GUI-Apps using flatpak and use distrobox for running terminal or non flatpak supported software. System extensions for nvidia drivers or other system packages.

Optional Gaming Mode

Enabling the extension adds a Steam Gamescope session on top of your system. Select it at login for a console-style experience, or configure autologin to boot straight into it.

Is it for you?

AstrOS is a strongly opinionated project. It’s for people who want a secure, encrypted, signed operating system that just works with minimal effort.

A good fit if

• You want verified boot and full-disk encryption without configuring any of it
• You’re happy with Flatpak, Distrobox, and system extensions
• You are a gamer that wants a steamos like gaming mode

Look elsewhere if

• Your hardware has no TPM 2.0 or UEFI
• You want to hand-modify files under /usr

Get involved

Questions, bug reports, and patches are all welcome.

Discord

Matrix

Reddit

GitHub (Mirror)

Forgejo