systemd-hwdb

Manage udev hardware database

TLDR

Update hardware database

$ systemd-hwdb update

Query database for modalias

$ systemd-hwdb query [modalias]

Update with strict error checking

$ systemd-hwdb -s update

Update in /usr/lib/udev

$ systemd-hwdb --usr update

Update for alternate root

$ systemd-hwdb -r [/path/to/root] update

systemd-hwdb manages the udev hardware database, which maps hardware identifiers (modalias) to properties and metadata. The database is compiled from text files in `/usr/lib/udev/hwdb.d/` and `/etc/udev/hwdb.d/` into a binary format for fast lookup.This database is used by udev rules to identify hardware and set appropriate properties.

PARAMETERS

-s, --strict

Return non-zero exit on parsing errors

--usr

Update database in /usr/lib/udev instead of /etc/udev

-r, --root= PATH

Operate on alternate root filesystem

COMMANDS

update

Compile hwdb source files into binary database

query MODALIAS

Query database for a specific modalias

INSTALL

sudo apt install udev

sudo zypper install udev

nix profile install nixpkgs#udev

CAVEATS

Must run `systemd-hwdb update` after modifying hwdb source files. The binary database is architecture-specific. Changes in /etc override /usr/lib entries.

HISTORY

systemd-hwdb replaces the older udev hwdb management, providing hardware identification data used throughout the system for device setup.