Category: Pi

Pi-Hole: DNSMASQ_WARN Maximum number of concurrent DNS queries reached (max: 150)

Resolving DNSMASQ_WARN – Maximum number of concurrent DNS queries reached (max: 150)

  • Connect to pihole via ssh
  • Navigate to /etc/dnsmasq.d/
  • If 02-custom-settings.conf does not exist, create it:
    • sudo nano 02-custom-settings.conf
    • Populate with the below and save :

  • Reboot pihole

CasaOS and LinkDing

Giving LinkDing a whirl. It isn’t featured in any of the stores I’ve found, so I rolled my own. Here’s a sample YAML:

Once it’s up, hit the terminal and create a user with:

From there it will prompt for a password.

Persistent Windows SMB mount in Raspbian via CIFS

I’m using Navidrome in CasaOS on a Pi for music right now and I like it quite a bit. The one thing irking me was that the network storage mounts you can define within CasaOS (Files > Location > Connect network storage) don’t persist. At least they don’t for me – every reboot or update and they’re gone.

I’ve gotten around this by creating a persistent mount within Raspbian utilizing CIFS.

SSH into your Pi, and go ahead and

to avoid having to sudo every line you input. First, make sure cifs-utils are installed (they should be, but still):

Now create a credentials file for your mount to access using nano:

Populate the credfile with the credentials necessary to access your Windows share:

Save it, then set the appropriate permissions to keep it safe from prying eyes:

Create a mount directory on your Pi to link the share to:

Now open fstab:

Add your mount to the bottom of the file, changing the first path to the Windows share and the second to the mount path you created previously:

Finally, reload the daemon:

And mount the share using the details you defined in fstab:

To confirm, cd to the share and confirm you can see the contents.

Calibre Web in a Container, and Credentials

My Calibre Web installed via container in CasaOS decided to lose its admin account creds. To reset, access the container terminal from within CasaOS, navigate to:

and enter:

Where password is your updated passy. If you try to use ‘password’ you’ll probably be kicked back for it not meeting complexity requirements.

Cron for Dynamic DNS Updating

I use my commercial host, Ionos, for websites, including creating subdomains for ones I’m hosting at home. However, I don’t pay for a static ip. I was using a Windows Scheduled Task to curl the necessary URLs to keep the IP updated, but I’m switching everything I can over to Linux, and a Pi.

Start by creating your .sh file and making it executable. I created in my home dir on my Pi, and populated it with my curl calls. I did this via Nano. Then make it executable:

Then I fired up cron by entering:

It’s going to ask you for an editor on first use. I say, stick with Nano.

After this it will present you with a crontab file. Scroll to the bottom and enter:

This will run your sh file every hour at the top of the hour.

Save the file.

If you want to see what’s up with Cron, enter:

If it’s running, it’ll show you the files – your sh file – in use by cron.

CasaOS and bash in Docker

I installed ArchiveBox on CasaOS and came upon a problem – I couldn’t figure out what the default credentials are, or even if there were any, and I didn’t know how to generate them from the command line. ArchiveBox told me to create a new superuser by running

From the command line, but doing so within the container terminal resulted in this:

But I found my way into the container bash thusly:

  • SSH into your pi running CasaOS
  • search for your ArchiveBox container ID:
  • You’ll see a path in your return with a long, long directory name, something like
  • This is your container ID. CD to /var/lib/docker/containers/and run the following, where containerID is the above ID:
  • This will invoke a bash within that container. From within it, run:
  • And follow the prompts to create a superuser for ArchiveBox. To drop out of bash, just input exit.


CasaOS – Tinkering

Somewhere in my intertoobs wanderings I came across CasaOS and, given I had an idle Pi 4 laying around, I decided to poke at it. After all, if it works worth a damn it could help consolidate all the disparate systems I have running locally.

CasaOS is basically a slick Docker manager that rides atop another OS. Getting it up and running on the Pi with a fresh Raspbian install was painless. Simple configs, like mounting network shares, is a breeze. So far I have the following running in it:

  • PiHole – Installed without a hitch. If this runs well it’ll replace the standalone PiHole Pi 3 I have running.
  • Calibre Web – Also installed without a hitch. Love this, because I hate running the Calibre thick client full time on my server simply for its web interface. Not a lot of instructions on this one – just make sure you have your library mounted and defined as a volume in the container settings.
  • Jellyfin – Another painless install (make sure to mount your files volume as described in the above Calibre Web settings). I installed this as a replacement for my current Jellyfin music server, which runs standalone in a fully fledged VM, gobbling unnecessary resources. But I stopped it midway through indexing my gajillion files because I discovered:
  • Navidrome – Will it be better than Jellyfin for audio? I don’t know, but I’m giving it a shot.  Currently still indexing – on directory number 12406. Heh. Now, Navidrome wouldn’t run initially, and CasaOS kept screaming that it was unhealthy. Its log filled with “exec /app/navidrome: exec format.” I discovered that the image I was pulling isn’t the most recent. I exported the ComposeFile from within the settings of the failed install, uninstalled it, and updated the image source in the ComposeFile to point to “” I then imported the file (Custom Install > Import from within the App Store) and it installed fine
  • Memos – Completely painless install. Came across this randomly and figured maybe it’d replace my TiddlyWiki instance running on my server. We’ll see.
  • Mealie – I ran across this neat app via some Youtubers Apps of The Year vid and was intrigued. An app that’ll scrape a online recipe page, pull the pertinent details of the recipe and ditch all the ads and fluff? Yes please! However, Mealie wasn’t in the default app store for CasaOS. I found CoolStore for Casa and added it as a source. From there Mealie installed no problem, and now I have a slew of other apps to sift through as well. Perhaps Casa can even replace my standalone VPN Pi. We shall see.