Linux网络状态命令-ss

[root@localhost ~]# ss -nat
State      Recv-Q Send-Q                                 Local Address:Port                                                Peer Address:Port              
LISTEN     0      128                                                *:22                                                             *:*                  
LISTEN     0      100                                        127.0.0.1:25                                                             *:*                  
ESTAB      0      96                                     192.168.1.251:22                                                   192.168.1.2:60117              
LISTEN     0      128                                               :::22                                                            :::*                  
LISTEN     0      100                                              ::1:25                                                            :::*

[root@localhost ~]# ss -natl
State      Recv-Q Send-Q                                 Local Address:Port                                                Peer Address:Port              
LISTEN     0      128                                                *:22                                                             *:*                  
LISTEN     0      100                                        127.0.0.1:25                                                             *:*                  
LISTEN     0      128                                               :::22                                                            :::*                  
LISTEN     0      100                                              ::1:25                                                            :::*

[root@localhost ~]# ss -natlp
State      Recv-Q Send-Q                                 Local Address:Port                                                Peer Address:Port              
LISTEN     0      128                                                *:22                                                             *:*                   users:(("sshd",pid=1184,fd=3))
LISTEN     0      100                                        127.0.0.1:25                                                             *:*                   users:(("master",pid=2325,fd=13))
LISTEN     0      128                                               :::22                                                            :::*                   users:(("sshd",pid=1184,fd=4))
LISTEN     0      100                                              ::1:25                                                            :::*                   users:(("master",pid=2325,fd=14))