To facilitate running the same xbutil or xbmgmt command on a multi-card environment XRT provides a utility script named xball. The script xball can be used as below:

#xball <xbutil | xbmgmt> <utility arguments>
xball xbutil examine

The xball script will detect all the cards attached to the server, and execute the xbutil or xbmgmt command on all of them.

Additionally, the xball script provides a filtering option to execute the command on some specific cards, such as

#Run `xbutil examine` command only on U30 cards
xball --device-filter 'u30'  xbutil examine

#Run `xbutil examine` command only on U250 cards
xball --device-filter '^xilinx_u250' xbutil examine