Rename fake modules to modules-old

nixos/modules-old/utils/ssh/README.md

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+# Adding SSH keys
+
+To incorporate SSH keys, for instance, to enable authentication with a Git server, follow these steps:
+
+Step 0: If necessary, generate a keypair, for example using the command:
+
+```bash
+ssh-keygen -t ed25519
+```
+
+Please note that setting a password for the keypair is not yet tested.
+
+Step 1: Create a new file named `yourservice.yaml` within the [secrets](../../../secrets/) directory by executing the following command:
+
+```bash
+sops secrets/yourservice.yaml
+```
+
+Within this file, create a value that contains your private key. For example:
+
+```yaml
+yourservice:
+    ssh: |
+        -----BEGIN OPENSSH PRIVATE KEY-----
+        <...>
+        -----END OPENSSH PRIVATE KEY-----
+```
+
+Step 2: Reference this value in [your sops configuration](../../utils/sops/default.nix) as follows:
+
+```
+sops.secrets."yourservice/ssh".format = "yaml";
+sops.secrets."yourservice/sss".sopsFile = secrets/youservice.yaml;
+```
+
+Step 3: Finally, add the SSH key to your SSH configuration so that it is used correctly when connecting to your host. Add the following lines to your SSH configuraton file:
+
+```
+Host yourservice
+    IdentityFile /run/secrets/yourservice/ssh
+```

nixos/modules-old/utils/ssh/default.nix

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+{ config, lib, pkgs, ... }:
+
+{
+  services.openssh = {
+    enable = true;
+    settings.PasswordAuthentication = false;
+  };
+
+  home-manager.users.tdpeuter = {
+    programs.ssh = {
+      enable = true;
+      matchBlocks = {
+        "Hugo" = {
+          hostname = "192.168.0.11";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/Hugo/ssh";
+          user = "admin";
+        };
+        "HPC" = {
+          hostname = "login.hpc.ugent.be";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/UGent/HPC/ssh";
+          user = "vsc44995";
+        };
+
+        # Git authentication
+        "git.depeuter.dev" = {
+          hostname = "git.depeuter.dev";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/Hugo/Gitea/ssh";
+          user = "git";
+        };
+        "github.com" = {
+          hostname = "github.com";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/GitHub/ssh";
+          user = "git";
+        };
+        "github.ugent.be" = {
+          hostname = "github.ugent.be";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/UGent/GitHub/ssh";
+          user = "git";
+        };
+        "subgit.ugent.be" = {
+          hostname = "subgit.ugent.be";
+          identitiesOnly = true;
+          identityFile = "/run/secrets/UGent/SubGit/ssh";
+          user = "git";
+        };
+      };
+    };
+  };
+}