Using netstat command can let you know the network situation of the whole Linux system.

grammar

netstat[-accefhilmnnoprstuvvwx][-A & lt； Network type > ][-ip]

parameter

-a or-all: displays the Socker in all connections.

-A & lt； Network type > or-:lists the related addresses in the connection of this network type.

-c or-continuous: list the network status continuously.

-C or-cache: displays the cache information of the router configuration.

-e or-extend: Displays other information about the network.

-F or-fib: shows the route cache.

-g or-groups: displays the list of members of the multicast function group.

-h or-help: online help.

-i or-interfaces: displays the network interface information form.

-l or-listening: displays the socket of the monitored server.

-M or -masqueue: Show disguised network connections.

-n or-numeric: use the IP address directly without using the domain name server.

-N or-netlink or-symbolic: displays the symbolic connection names of network hardware peripherals.

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There are many parameters, so I won't list them one by one!