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Blog: Sync Hermes Agent data to local machine with Unison over SSH

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2026-07-29 06:41:29 -03:00
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{
"posts": [
{
"id": "sync-hermes-agent-data-with-unison",
"date": "2026-07-29",
"area": "tutorial",
"agent": "hermes",
"headline": "Sync Your Hermes Agent Data to Your Local Machine with Unison",
"teaser": "Use Unison to keep your local workspace in sync with your Hermes Agent on the VPS. Bidirectional file sync over SSH — no plugins, no Docker volumes, just reliable file synchronization.",
"link": "blog/posts/sync-hermes-agent-data-with-unison.html"
},
{
"id": "crm-automation-with-ai-agent",
"date": "2026-07-24",
blog/posts/sync-hermes-agent-data-with-unison.html
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<a class="back" href="https://derez.ai/#blog">&larr; Back to Blog</a>
<h1>Sync Your Hermes Agent Data to Your Local Machine</h1>
<div class="meta">
<span>July 29, 2026</span>
<span class="area-tag">tutorial</span>
<span class="chip-tag">hermes</span>
<span class="chip-tag">devops</span>
</div>
<p>
Your Hermes Agent lives on a remote VPS. It works, it writes blog posts, sends cold emails, manages your Odoo — but when you want to review its work, edit its files, or inspect its state, you either SSH in or use the dashboard file manager.
</p>
<p>
There's a better way. <strong>Unison</strong> syncs files bidirectionally between machines over SSH — no plugins, no cron hacks, no Docker volumes. Just two directories staying in sync.
</p>
<h2>Why Unison?</h2>
<p>
rsync is great for one-way copies. But your agent modifies files on the VPS — it writes blog posts, updates CRM data, runs workflows. If you only rsync <em>from</em> the VPS, you lose local changes. If you only rsync <em>to</em> the VPS, you overwrite what the agent did.
</p>
<p>
Unison solves this by merging changes from <strong>both sides</strong>. It's bidirectional, conflict-aware, and runs over SSH. Perfect for keeping your local workspace in sync with a remote agent.
</p>
<h2>The Setup</h2>
<h3>1. Install Unison on Both Machines</h3>
<div class="code-block">
<div class="label">Server (VPS)</div>
<pre><code># On derez.ai or your VPS
apt install unison # Debian/Ubuntu
# or
yum install unison # RHEL/CentOS</code></pre>
</div>
<div class="code-block">
<div class="label">Local Workstation (macOS)</div>
<pre><code>brew install unison</code></pre>
</div>
<div class="code-block">
<div class="label">Local Workstation (Linux)</div>
<pre><code>apt install unison # Debian/Ubuntu
# or
sudo dnf install unison # Fedora</code></pre>
</div>
<h3>2. Test the Connection</h3>
<p>
Before setting up cron, verify Unison can connect over SSH:
</p>
<div class="code-block">
<div class="label">Run from your local machine</div>
<pre><code>unison -testservercmd 'ssh root@hood.derez.ai "unison"' /path/to/local/dir ssh://root@hood.derez.ai:2281//path/to/remote/dir
# You should see:
# No changes. The two roots are in sync.</code></pre>
</div>
<h3>3. Set Up the Sync</h3>
<p>
Here's the production sync command I use daily. It syncs my entire Hermes workspace — skills, profiles, blog posts, CRM data, scripts — every minute:
</p>
<div class="code-block">
<div class="label">Local machine cron (~/.bashrc or crontab)</div>
<pre><code>* * * * * unison /home/user/Agents/pa ssh://root@hood.derez.ai:2281//root/workspace -auto -batch 2>&amp;1 | tail -n 5</code></pre>
</div>
<p>
Let's break this down:
</p>
<ul>
<li><code>/home/user/Agents/pa</code> — the local directory to sync <em>from</em></li>
<li><code>ssh://root@hood.derez.ai:2281//root/workspace</code> — the remote directory to sync <em>to</em> (note the double slash after the host)</li>
<li><code>:2281</code> — SSH port (if using a non-standard port)
<li><code>-auto</code> — automatically accept the default action for each file (no interactive prompts)</li>
<li><code>-batch</code> — suppress progress output, only show errors</li>
</ul>
<h3>4. Set Up SSH Keys</h3>
<p>
For cron to work without a password prompt, set up SSH key authentication:
</p>
<div class="code-block">
<div class="label">On your local machine</div>
<pre><code># Generate a key if you don't have one
ssh-keygen -t ed25519 -C "hermes-sync"
# Copy to server
ssh-copy-id -p 2281 root@hood.derez.ai</code></pre>
</div>
<h2>What Gets Synced</h2>
<p>
Here's what I typically sync:
</p>
<ul>
<li><strong>/root/workspace</strong> — My main working directory on the VPS</li>
<li><strong>~/Agents/pa</strong> — The agent profiles and skills directory</li>
<li><strong>~/derez.ai/blog</strong> — Blog posts (so I can edit them in VS Code locally)</li>
<li><strong>~/derez.ai/data</strong> — CRM data, analytics, and configuration files</li>
</ul>
<p>
You can adjust the paths to match your setup. The key is picking the directories that contain files you want to work with locally.
</p>
<div class="pro-tip">
<strong>Pro tip:</strong> Use <code>-ignore "Name *.pyc"</code> and <code>-ignore "Name __pycache__"</code> to skip Python cache files. They sync fast but clutter your local directory.
</div>
<h2>Common Issues</h2>
<h3>"Connection refused" — SSH port</h3>
<p>
If your server uses a non-standard SSH port (like 2281), you <strong>must</strong> specify it in the Unison URL:
</p>
<div class="code-block">
<pre><code># Wrong (uses port 22):
ssh://root@hood.derez.ai//root/workspace
# Right (uses port 2281):
ssh://root@hood.derez.ai:2281//root/workspace</code></pre>
</div>
<h3>"Permission denied" — SSH key</h3>
<p>
Make sure your SSH key is in <code>~/.ssh/id_ed25519</code> on the local machine, and the corresponding <code>id_ed25519.pub</code> is in the server's <code>~/.ssh/authorized_keys</code>.
</p>
<h3>"Conflict detected"</h3>
<p>
If both sides have changed the same file, Unison will pause and ask what to do. Add <code>-auto</code> to accept the default (usually "Newer on the VPS"), or use <code>-force</code> to always prefer one side:
</p>
<div class="code-block">
<pre><code># Always prefer VPS version for conflicting files
unison /local/path ssh://root@server//remote/path -auto -force ssh</code></pre>
</div>
<h2>Why This Matters for Your Agent</h2>
<p>
When your agent writes a blog post, it saves it to the VPS. With Unison, that post appears on your local machine within a minute — ready to preview, edit, or share. When you tweak a skill file locally, it syncs up to the agent.
</p>
<p>
It's the missing piece in the remote-agent workflow: <strong>seeing what the agent did, when it did it, without SSHing in.</strong>
</p>
<div class="pro-tip">
<strong>For derez.ai users:</strong> Your instance already has SSH access. Use the same SSH key from your local machine, adjust the hostname to your instance, and you're syncing in under 2 minutes. No plugins, no Docker, no extra configuration.
</div>
<p>
Use coupon code <strong>BLOG950</strong> at checkout to get your first month free — zero risk, full access.
</p>
<p>
<a href="https://derez.ai/#pricing">Deploy your own agent — and sync its data to your machine.</a>
</p>
<p style="margin-top:48px;padding-top:24px;border-top:1px solid #1a1a24;font-size:0.85rem;color:#666;">
<a href="https://derez.ai" style="color:#00f5ff">derez.ai</a> — Deploy your AI agent in 10 Minutes.
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