# Synology DS218plus

Operational notes for accessing and navigating the Synology NAS without rediscovering paths.

## Connection

- SSH config alias: `synology`
- Hostname/IP: `192.168.86.31`
- SSH user: `jared`
- SSH key from `~/.ssh/config`: `~/.ssh/id_ed25519_git`
- Verified NAS hostname: `DS218plus`

Quick check:

```bash
ssh synology 'hostname; id'
```

Expected identity:

```text
DS218plus
uid=1026(jared) gid=100(users) groups=100(users),101(administrators),65536(family)
```

## Volume Paths

Synology shared folders are mounted under `/volume1` over SSH.

Important paths:

| Purpose | SSH path |
| --- | --- |
| Main backup share | `/volume1/backup` |
| Fedora continuous restic repo | `/volume1/backup/fedora_desktop_backup_continuous` |
| Older May 2024 user backup | `/volume1/backup/jared_backup052124` |
| Older May 2024 Fedora backup | `/volume1/backup/fedora_backup052124` |
| October 2024 Fedora recovery folder | `/volume1/backup/fedora_recovery_oct2024` |

List likely backup folders:

```bash
ssh synology 'find /volume1/backup -maxdepth 2 -mindepth 1 -type d | sort'
```

## Restic Access

Local `restic` is installed at `/usr/bin/restic`. Credentials are sourced from `~/.credentials`; do not print the file or password.

The active backup script uses:

```bash
source ~/.credentials
restic -r "sftp:${SYNOLOGY_HOST}:${SYNOLOGY_PATH}" snapshots --compact
```

As of 2026-05-14, `~/.credentials` has:

```text
SYNOLOGY_HOST=synology
SYNOLOGY_PATH=/home/Backups/fedora-workstation
```

Note: that SFTP path is a virtual path for restic/SFTP access. Over an interactive SSH shell, the same repository is visible at:

```text
/volume1/backup/fedora_desktop_backup_continuous
```

Repository structure confirmed on 2026-05-14:

```text
config
data/
index/
keys/
locks/
snapshots/
```

## Useful Restic Commands

List snapshots:

```bash
source ~/.credentials
restic -r "sftp:${SYNOLOGY_HOST}:${SYNOLOGY_PATH}" snapshots --compact
```

List a path in the latest snapshot:

```bash
source ~/.credentials
restic -r "sftp:${SYNOLOGY_HOST}:${SYNOLOGY_PATH}" ls latest /home/jared/.ssh
```

Search snapshots for specific files:

```bash
source ~/.credentials
restic -r "sftp:${SYNOLOGY_HOST}:${SYNOLOGY_PATH}" find /home/jared/.ssh/id_rsa /home/jared/.ssh/id_rsa.pub
```

Restore a specific file or directory to a temporary location:

```bash
source ~/.credentials
mkdir -p /tmp/restic-restore
restic -r "sftp:${SYNOLOGY_HOST}:${SYNOLOGY_PATH}" restore latest \
  --target /tmp/restic-restore \
  --include /home/jared/path/to/file
```

## Snapshot State on 2026-05-14

The Fedora continuous repo is accessible and decrypts successfully. It had 17 snapshots from 2026-04-11 through 2026-05-11.

Latest snapshot observed:

```text
c4ec0c91  2026-05-11 01:58:03  host=fedora  tag=fedora  size=18.779 GiB
```

## SSH Key Recovery Findings

Checked while investigating Hyperthrive VPS access on 2026-05-14:

- Latest restic snapshot `.ssh` contains only `config`, `id_ed25519_git`, `id_ed25519_git.pub`, `id_ed25519_ovh_backup`, `id_ed25519_ovh_backup.pub`, `known_hosts`, and `known_hosts.old`.
- `restic find` did not find `/home/jared/.ssh/id_rsa`, `/home/jared/.ssh/id_rsa.pub`, `id_ed25519_forgejo`, or `id_ed25519_forgejo.pub`.
- `/volume1/backup/jared_backup052124/.ssh` exists but is empty.
- `/volume1/backup/fedora_backup052124/jared/.ssh` exists but is empty.
- No `.ssh` files were found under `/volume1/backup/fedora_backup052124` or `/volume1/backup/fedora_recovery_oct2024` in the checked paths.