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背景：TCP高并发时用 netstat反应不过来，用ss,ss --help查不到下面的参数，得用 man ss查看。
ss -o state established src 10.44.202.177 sport = 41852 dst 10.51.77.34 dport = 6379 Netid Recv-Q Send-Q               Local Address:Port                                Peer Address:Port                 tcp   0      0                    10.44.202.177:41852                                10.51.77.34:6379


Linux下的SS查看Linux的Http端口完成情况
ss -o state established '( dport = :http or sport = :http )'|less

Netid  Recv-Q Send-Q Local Address:Port                 Peer Address:Port                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32331                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32329                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32347                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32322                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32346                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32321                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32327                
tcp    0      0      101.200.228.135:http                 61.150.114.230:32328                
tcp    0      0      101.200.228.135:http                 61.150.114.230:23159                
tcp    0      0      101.200.228.135:http                 1.85.216.135:50864                
tcp    0      0      101.200.228.135:http                 140.205.205.4:63844  


ss dst  10.51.77.34
#ss dst  10.51.77.34
Netid State      Recv-Q Send-Q          Local Address:Port                           Peer Address:Port                
tcp   ESTAB      0      0                 10.51.77.34:6379                            10.51.77.34:53590                
tcp   ESTAB      0      0                 10.51.77.34:6379                            10.51.77.34:53586                
tcp   ESTAB      0      0                 10.51.77.34:53586                           10.51.77.34:6379                
tcp   CLOSE-WAIT 1      0                 10.51.77.34:43714                           10.51.77.34:6379                
tcp   ESTAB      0      0                 10.51.77.34:53590                           10.51.77.34:6379                
tcp   CLOSE-WAIT 1      0                 10.51.77.34:43718                           10.51.77.34:6379


加个源端口过滤一下（sport = 6379，等号之间得有空格）：
ss dst  10.51.77.34 sport = 6379
Netid State      Recv-Q Send-Q          Local Address:Port                           Peer Address:Port                
tcp   ESTAB      0      0                 10.51.77.34:6379                            10.51.77.34:53590                
tcp   ESTAB      0      0                 10.51.77.34:6379                            10.51.77.34:53586


查看源地址Http端口的一个情况：
ss src 101.200.228.135 sport = :http
tcp   ESTAB      0      0             101.200.228.135:http                         101.81.172.212:41352                
tcp   ESTAB      0      0             101.200.228.135:http                           36.110.2.171:35007                
tcp   ESTAB      0      0             101.200.228.135:http                        115.236.174.162:55497                
tcp   ESTAB      0      0             101.200.228.135:http                           36.110.2.171:33458

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/9450/
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