created:: 2024-01-26T15:43:17 (UTC -05:00)
tags:: nixos
source:: https://serverfault.com/questions/890886/recover-from-nixos-rebuild-test-without-a-reboot
author:: aij
20311 silver badge77 bronze badges

- Recover from `nixos-rebuild test` without a reboot - Server Fault
    
    > ## Excerpt
    > Is there a way to revert to the previous (or at least "current") configuration after nixos-rebuild test without rebooting?
    
    Per the nixos-rebuild manual:
    
     test
         Build and activate the new
    
    ---
    ```
    # List previous generations
    sudo nix-env --list-generations -p /nix/var/nix/profiles/system
    
    # Live switch to any generation
    sudo nix-env --switch-generation 12345 -p /nix/var/nix/profiles/system
    sudo /nix/var/nix/profiles/system/bin/switch-to-configuration switch
    ```
    
    Source: [https://github.com/NixOS/nixpkgs/issues/24374](https://github.com/NixOS/nixpkgs/issues/24374)