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systool - Unix, Linux Command

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systool - view system device information by bus, class, and topology


systool [options [device]]


Calling systool without parameters will present all available bus types, device classes, and root devices.

When device is supplied, the information reqested by options is shown only for the specified device, otherwise all present devices are displayed.

systool uses APIs provided by libsysfs to gather information. systool runs only on Linux systems running kernels 2.5 or later, with the sysfs filesystem mounted.


-a Show attributes of the requested resource
-b bus Show information for a specific bus
-c class Show information for a specific class
-d Show only devices
-h Show usage
-m module_name
  Show information for a specific module
-p Show absolute sysfs path to the resource
-v Show all attributes with values
-A attribute
  Show attribute value for the requested resource
-D Show only drivers
-P Show device’s parent


The web page of libsysfs at


systool was written by Ananth Mavinakayanahalli <> and Daniel Stekloff <>.

This man page was contributed by Martin Pitt <> for the Debian GNU/Linux system (but may be used by others).
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