Question 1

How to fix '/bin/bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)' when running 'cpu' on DietPi?

Accepted Answer

The en_US.UTF-8 locale is not compiled. Compile it using one of these methods: 1. Run `sudo dietpi-config`, go to Language/Regional Options > Locale, select `en_US.UTF-8`. 2. Run command: `/boot/dietpi/func/dietpi-set_software locale en_US.UTF-8`. 3. Manually reconfigure locales: `sudo dpkg-reconfigure locales` and check `en_US.UTF-8`. After compiling, log out and back in or reboot to apply the change. The warning will no longer appear.

Question 2

Why does Radarr show 502 Bad Gateway after updating DietPi to 10.4.2?

Accepted Answer

DietPi 10.4.2 altered /tmp handling (likely moving to tmpfs), causing the symlinked database file in /tmp to be lost. Stop Radarr, then replace the broken symlink with the backup database: sudo rm /mnt/dietpi_userdata/radarr/radarr.db && sudo cp /mnt/dietpi_userdata/radarr/radarr.db.bak /mnt/dietpi_userdata/radarr/radarr.db. Ensure correct ownership: sudo chown radarr:dietpi /mnt/dietpi_userdata/radarr/radarr.db. Restart Radarr. To prevent recurrence, avoid placing databases in /tmp; use a persistent directory instead. This also applies to Sonarr and Lidarr.

Question 3

How to fix Docker daemon failing with 'iptables: Table does not exist' after upgrading DietPi on Raspberry Pi?

Accepted Answer

The Raspberry Pi kernel 6.18.29 in DietPi 10.4.2 lacks legacy iptables modules. Switch to nftables compatibility: `sudo update-alternatives --set iptables /usr/sbin/iptables-nft && sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-nft && sudo systemctl restart docker`. This forces Docker to use nftables instead of legacy iptables.

Question 4

How to fix missing rk3588-i2c5-m2.dtbo overlay on OrangePi 5 Ultra for I2C5 on pins 37 and 12?

Accepted Answer

Manually create the overlay file. Run: sudo mkdir -p /boot/dtb/overlay && echo '/dts-v1/; / { fragment@0 { target = <0xffffffff>; __overlay__ { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <0xffffffff>; }; }; __fixups__ { i2c5 = "/fragment@0:target:0"; i2c5m2_xfer = "/fragment@0/__overlay__:pinctrl-0:0"; }; };' | sudo tee /boot/dtb/overlay/rk3588-i2c5-m2.dtbo > /dev/null. Then reboot. Ensure the overlay is enabled in armbianEnv.txt if needed.

Question 5

How to fix missing libpcap, libturbojpg, ffmpeg, aioesphomeapi errors after fresh HomeAssistant installation on DietPi?

Accepted Answer

Install the missing system packages via apt: sudo apt install libpcap0.8t64-dev ffmpeg libturbojpg0-dev (non‑dev binary packages may also work). Then install aioesphomeapi in the HomeAssistant virtual environment: sudo -u homeassistant uv pip install --directory /opt/homeassistant -U aioesphomeapi. Restart HomeAssistant.

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