Name
systemd-hwdb — hardware database management tool
Synopsis
systemd-hwdb [options] update 
systemd-hwdb [options] query modalias 
Description
systemd-hwdb expects a command and command
    specific arguments.  It manages the binary hardware database.
Options
- --usr
- Generate in /usr/lib/udev instead of /etc/udev. - Added in version 219. 
- -r,- --root=- PATH
- Alternate root path in the filesystem. - Added in version 219. 
- -s,- --strict
- When updating, return non-zero exit value on any parsing error. - Added in version 239. 
- -h,- --help
- Print a short help text and exit.
     
systemd-hwdb
      [options]
      update
Update the binary database.
systemd-hwdb
      [options]
      query
      MODALIAS
    
Query database and print result.