View TCP connection statuses on the CentOS server

Netstat-n | awk & #39;/^ tcp/{++ S [$ NF]} END {for (ainS) printa, S [a]} & #39; TIME_WAIT8947FIN_WAIT115FIN_WAIT21ESTABLISHED55SYN_R

Netstat-n | awk '/^ tcp/{++ S [$ NF]} END {for (a in S) print a, S [a]}' TIME_WAIT 8947 FIN_WAIT1 15 FIN_WAIT2 1 ESTABLISHED 55 SYN_RECV 21 CLOSING 2 LAST_ACK 4

TCP connection status  LISTEN: listens for connection requests from remote TCP ports SYN-SENT: wait for a matched connection request after sending a connection request again SYN-RECEIVED: wait for the other party to confirm the connection request after receiving and sending a connection request ESTABLISHED: indicates an opened connection. FIN-WAIT-1: waiting for confirmation of the remote TCP connection interruption request or previous connection interruption request FIN-WAIT-2: Waiting for connection interruption requests from remote TCP CLOSE-WAIT: Waiting for connection interruption requests from local users CLOSING: waiting for confirmation of remote TCP connection interruption LAST-ACK: waiting for confirmation of the original connection interruption request sent to remote TCP TIME-WAIT: WAIT for enough TIME to confirm that the remote TCP receives the connection interruption request. CLOSED: No connection status