why --tcp option failed? should i install some package? if yes, which package i should install?
this question is not the same as http://stackoverflow.com/questions/10475991/tcp-sockets-double-messages
dstat --tcp Module tcp has problems. (Cannot open file /proc/net/tcp6.) None of the stats you selected are available.
what is the problem with module tcp, how to find the problem?
what i should do in order to fix this issue?