October 27, 2026October 27, 2026by Brandon Lee

If you haven’t heard of them before, the Proxmox helper scripts make it really easy to go from a project that you are interested in to an app that actually works in your home lab. Just a few commands at a prompt, a short bit of waiting and then you will have another service running in your stack. This is really awesome to have this level of automation and simplicity. But if you are putting something like this into your “production” home lab, we definitely want to do some checks before we feel like things are “done” and we are good. Let’s look at Proxmox LXC helper scripts and important checks to make

What are helper scripts?

In case you haven’t heard of helper scripts (which may be on the rare side, but if you are just starting out, that is fair also), these are community created scripts that help you to automate things. These typically include doing things like creating LXC containers, and install your apps, etc.

The original project was created by a developer known as ttek who sadly has passed away in November 2024. The community though has continued his work through the Proxmox VE Community Scripts project page which continues to maintain and add scripts that build on the foundation he created.

1. Download the script and read it before running it

I always tell anyone. Don’t just blindly download a script and run it. Try to understand what it does “before” you apply the script to your Proxmox VE Server or anything else. This is how we can get ourselves into trouble if we just blindly install things without asking the right questions and doing our due diligence.

The first thing I like to do before running one of the helper scripts is download the script first. For example, for the Community Scripts Nginx Proxy Manager installer, you can save it without running it first with the following command:

curl -fSL \
  https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/ct/nginxproxymanager.sh \
  -o nginxproxymanager.sh

Then, you can open it.

less nginxproxymanager.sh

I am looking for the overall flow of the script and what it does.

• What does it download?
• What commands run on the Proxmox host?
• Where does it create the container
• How does it install the application inside it?

I like to pay attention to things it might be doing like other downloads, shell files, any commands that are destructive and anything involved credentials or SSH. Also, don’t stop at a short entry script. These can call and reference other scripts, so be sure to follow those calls in the script.

Once you are ready, then you can run the helper script to install the LXC and application, etc:

2. Use AI to help review the script and any security concerns

AI is something we hear all the time these days and definitely get tired of hearing it. But in my opinion, this is one of the things that AI is absolutely purpose-built to be able to do quickly and easily and that is review code. I haven’t personally had any problems with the scripts I have used from the Community Scripts project page, but this is just a safety net and sanity check in addition to just common sense checks like we did above.

You can use your favorite model of choice with a prompt like:

Review this shell script and help me understand what it is doing and distinguish commands running on the Proxmox host from commands running inside the container. Identify additional downloaded or sourced files, destructive operations, credential use, persistence changes, and any external calls. Let me know if you couldn't inspect any dependencies and identify anything that may look to be malicious.

I like the dependencies question as if it can’t retrieve a file that is referenced, really the review of what the code does isn’t complete. I like to ask it for the exact commands behind any findings as well, especially related to anything suspicious.

Keep in mind that AI cannot guarantee that code is safe to use, but it can definitely go a long way in helping to understand what the code is doing in general and help you to have more confidence the script is safe to execute.

My overall goal is to be able to make a decision that you feel good about and have confidence that you aren’t going to have to burn down your Proxmox host after executing something that turned out to be a bit suspicious.

3. Inspect what the helper script installed and look at the container settings

Now, if you decide to install the helper script application or deploy, I like to also look at the “after” installation as well. I want to make sure the app it is supposed to bring up is indeed reachable and what its config looks to be.

Browsing out to the application should be successful.

You can take a look at the configuration of the LXC container if this is what was the result of the helper script with the following as an example:

pct config 103
pct enter 103

Replace the “103” with the container ID in your environment. The first command displays its Proxmox configuration, while the second opens a shell inside the running LXC.

For a Debian or Ubuntu container using systemd, I check:

cat /etc/os-release
systemctl --type=service --state=running
ss -lntup

These commands will get you the operating system, running services, and ports that are listening. You can check your specific application’s definition with the following:

systemctl cat example.service

4. Be sure to get your Proxmox helper script LXC in backups

Keep in mind that your resource that is produced from the Proxmox helper script is not automatically added to your backups. This is an extremely important step and one that can slip under the radar if you slowly grow to rely on the helper script produced resource over time.

If you used the helper script to create a “production” type resource that you will be relying on like a reverse proxy or something similar, get it added to your backup configuration as soon as possible.

Also, keep in mind that the root disk is backed up differently than a Proxmox managed volume or host bind mount. They don’t have the same backup behavior. If your helper script maps a bind-mount or device-mount, the contents of these are excluded from vzdump container backups. If you want to include the managed volumes in Proxmox, make sure the backup option is enabled. This is easy to overlook.

You could possibly have an LXC backup that looks complete and is successful but that doesn’t include an important data directory that is outside of the LXC container.

5. Add to HA configuration in Proxmox VE Server cluster

Another configuration that is easy to miss for Proxmox helper script-created resources in a Proxmox VE Server cluster is adding these resources to your HA configuration in your Datacenter HA config. Adding your VM or LXC container to the HA configuration will help to make sure these resources are restarted if the host they are currently on goes down.

HA will restart these resources on another node in the cluster that is healthy. However, you have to enable this on these resources individually. Outside of protecting your VMs or LXCs and proactively configuring them to restart in the event of a failure, it also allows them to seamlessly be moved when you place a Proxmox VE Server host into maintenance mode when applying patches and updates.

6. Know how to apply updates and test startup behavior

One thing I like about manually building out an environment for an application is that you usually understand much better how things are put together. You know how the OS was loaded, and you understand how the application is installed and configured.

But with Proxmox helper scripts, this abstracts a lot of this from you when you use them for installation. This is good from an automation standpoint, but again, you don’t understand as well how things are put together since it is done for you.

This is something though that if I do use a helper script to install an application and it provisions an LXC for me, I like to go back and understand the architecture better and how the app is actually installed inside the container. Also, going along with that, I want to know how I go about updating it, including the OS and the application.

Most of the community script resources have instructions available on how you can update the solution. Most that I have seen have you connect to the console of the LXC and type update to update them. So, be sure to pay attention to the documentation on that front as this will be important for lifecycle management of the app.

7. Test recovery and document the next deployment

Finally, you need to understand how you would restore the environment if it is lost? If you are looking to backup LXC containers, these are only supported for backup either inside the web UI of your Proxmox VE Server or you can backup your containers using Proxmox Backup Server which gets you compression and deduplication.

Most of the commercial backup solutions I have seen out there so far do not backup LXC containers as of yet, so keep that in mind the commercial solutions are virtual machines only. But also, as we mentioned above too, be sure to understand if you have any data mounts that are present. These won’t get backed up by default using a regular vzdump.

I like to document everything in a small service record or changelog. Take a look at how I have been using AI with a Hermes agent to interact with Netbox and keep my home lab documented, including journals that record changes I have made.

I would include things like the installation source, settings, data mounts, update instructions, and recovery steps. Don’t put credentials in your service record or changelog and keep these in a password manager.

Wrapping up

Proxmox helper scripts can save you a lot of time to deploy available applications. It automates the process to get up and running. But make sure to make these checks as they will help you to keep security top of mind and also not accidentally skip over getting your helper script resources backed up, and configured for HA. Also, know how to recover when you need to, having good documentation on how everything is put together. How about you? What do you do before and after deploying with a helper script?

More in this topic

• 5 Things I’d Test Before Trusting Proxmox High Availability
• Your First Proxmox Server Can Do More Than You Think
• 7 Things You Don’t Need to Run a Great Proxmox Home Lab