My NixOS configurations for VPS

Steps to add a new server:

1. Install Nix on target host and add substituters to /etc/nix/nix.conf

2. Add a new configuration to this repo based on nixos-generate-config result on target host, with ssh and public keys configured

3. Create /etc/NIXOS and /etc/NIXOS_LUSTRATE on target host

4. Run sudo mkdir /boot.bak && sudo mv /boot/* /boot.bak on target host

5. nixos-rebuild boot --flake '.#<new_server>' --target-host <new_server> --substitute-on-destination

6. Reboot target host

7. Remove target host from ~/.ssh/known_hosts, because its keys are regenerated

8. Reset root password for target host

9. Use SSH port forwarding to configure Syncthing for the first time

ssh -L 18384:127.0.0.1:8384 <new_server> -N

10. Set up Cloudflare Warp

warp-cli registration new
warp-cli mode proxy
warp-cli connect

11. Set up swap file and redeploy