Provided by: can-utils_2018.02.0-1_amd64 

NAME
jspy - manual page for jspy 2018.02.0-1
SYNOPSIS
jspy [OPTION...] [[IFACE:][NAME|SA][,PGN]]
DESCRIPTION
jspy: An SAE J1939 spy utility
OPTIONS
-v, --verbose
Increase verbosity
-P, --promisc
Run in promiscuous mode (= receive traffic not for this ECU)
-b, --block=SIZE
Use a receive buffer of SIZE (default 1024)
-t, --time[=a|d|z|A]
Show time: (a)bsolute, (d)elta, (z)ero, (A)bsolute w date
jspy 2018.02.0-1 February 2018 JSPY(1)