### ss_listen
### command: ss -lntup
Netid State  Recv-Q Send-Q               Local Address:Port   Peer Address:Port Process                                                                         
udp   UNCONN 0      0                          0.0.0.0:41641       0.0.0.0:*     users:(("tailscaled",pid=73120,fd=21))                                         
udp   UNCONN 0      0                          0.0.0.0:68          0.0.0.0:*     users:(("dhclient",pid=2115,fd=6))                                             
udp   UNCONN 0      0                          0.0.0.0:68          0.0.0.0:*     users:(("dhclient",pid=1817,fd=6))                                             
udp   UNCONN 0      0                          0.0.0.0:111         0.0.0.0:*     users:(("rpcbind",pid=1487,fd=6))                                              
udp   UNCONN 0      0                             [::]:41641          [::]:*     users:(("tailscaled",pid=73120,fd=22))                                         
udp   UNCONN 0      0                             [::]:111            [::]:*     users:(("rpcbind",pid=1487,fd=8))                                              
tcp   LISTEN 0      512                 100.105.188.32:59585       0.0.0.0:*     users:(("tailscaled",pid=73120,fd=26))                                         
tcp   LISTEN 0      1                          0.0.0.0:52611       0.0.0.0:*     users:(("leofs_mond",pid=2233,fd=41))                                          
tcp   LISTEN 0      128                        0.0.0.0:111         0.0.0.0:*     users:(("rpcbind",pid=1487,fd=7))                                              
tcp   LISTEN 0      511                        0.0.0.0:81          0.0.0.0:*     users:(("ProxyServer",pid=2332,fd=9),("ProxyServer",pid=2331,fd=9))            
tcp   LISTEN 0      128                        0.0.0.0:22          0.0.0.0:*     users:(("sshd",pid=2185,fd=5))                                                 
tcp   LISTEN 0      512                        0.0.0.0:23451       0.0.0.0:*     users:(("leofs_cfgd",pid=2259,fd=4))                                           
tcp   LISTEN 0      128                              *:9090              *:*     users:(("systemd",pid=1,fd=111))                                               
tcp   LISTEN 0      512    [fd7a:115c:a1e0::c63b:bc21]:41609          [::]:*     users:(("tailscaled",pid=73120,fd=29))                                         
tcp   LISTEN 0      100                              *:9898              *:*     users:(("java",pid=2482,fd=72))                                                
tcp   LISTEN 0      128                           [::]:111            [::]:*     users:(("rpcbind",pid=1487,fd=9))                                              
tcp   LISTEN 0      128                           [::]:22             [::]:*     users:(("sshd",pid=2185,fd=6))