Shulou(Shulou.com)06/02 Report--

1. Check whether the server port is occupied

> lsof-iRu 8081

2. View all ports of the server

> netstat-ntlp

3. Check whether the server opens a port.

Tcp port: > netstat-ntpl

Udp port: > netstat-nupl

Common parameters:

-a (all) shows all options, but does not show LISTEN correlation by default

-t (tcp) displays only tcp related options

-u (udp) shows only udp related options

-n refuses to display aliases and can show that all numbers are converted into numbers.

-l lists only the status of services in Listen (monitoring)

-p displays the name of the program that established the relevant link

-r displays routing information, routing table

-e displays extended information, such as uid, etc.

-s statistics based on each protocol

-c execute the netstat command at regular intervals.

Tip: the status of LISTEN and LISTENING can only be seen with-an or-l

Summary

The above is the editor introduced to you under the linux to check whether the port is occupied and check all the ports, hope to help you, if you have any questions, please leave me a message, the editor will reply to you in time. Thank you very much for your support to the website!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.