-D FILE
Do not display anything, just dump raw information about TCP sockets to FILE after applying filters. If FILE is - stdout is used.

# ss -i | head
State      Recv-Q Send-Q      Local Address:Port          Peer Address:Port
ESTAB      0      0         173.xxx.xxx.xxx:46780         72.21.203.xx:www
         cubic wscale:6,7 rto:276 rtt:76/38 cwnd:10 send 1.5Mbps rcv_space:14600
ESTAB      0      0         173.xxx.xxx.xxx:35674        208.71.121.xx:www
         cubic rto:272 rtt:72/36 cwnd:10 send 1.6Mbps rcv_space:14600
ESTAB      0      0         173.xxx.xxx.xxx:33496       198.252.206.xx:https
         cubic wscale:9,7 rto:274 rtt:74.875/2.25 ato:40 cwnd:10 send 1.5Mbps rcv_rtt:524913 rcv_space:29456
ESTAB      0      0         173.xxx.xxx.xxx:49605       205.251.242.xx:www
         cubic wscale:6,7 rto:282 rtt:82.625/37.5 cwnd:10 send 1.4Mbps rcv_space:14600