## home-manager
https://github.com/nix-community/home-manager

For a systematic overview of Home Manager and its available options, please see
- the [Home Manager manual](https://nix-community.github.io/home-manager/index.html) and
- the [Home Manager configuration options](https://nix-community.github.io/home-manager/options.html).


## Install a new host

This installs nixos on host `somehost`:
```bash
nix-shell -p nixUnstable --run 'nixos-install --flake https://gitlab.jalr.de/jalr/nixos-configuration#somehost --no-channel-copy'
```

### setting up sops
Get the host key and convert it.
```bash
ssh-keyscan -t ed25519 $host | ssh-to-age
```

Then add the key to `.sops.yaml`

If the key changed, you might want to run
```bash
sops updatekeys hosts/$host/secrets.yaml
```

## nix repl
start an interactive environment for evaluating Nix expressions

```
$ nix repl

nix-repl> a=builtins.getFlake (toString ./.)
```

```
$ nix repl

nix-repl> :lf .#
```


## Import GPG public key
```
gpg --card-edit
gpg/card> fetch
```