Finding the process that is using a certain port in Linux

I'd like to be able to find out which process is currently using a certain port in Linux. Is there any way to do this?

5 Answers

You have a couple of options:

lsof -i tcp:80 

will give you the list of processes using tcp port 80.

Alternatively,

sudo netstat -nlp 

will give you all open network connections.

netstat -lp 

I am using "CentOS 7 minimal" which has nor netstat neither lsof. But a lot of linux distributions have the socket statistics command (i.e. ss).

Here is an example of execution:

# ss -tanp | grep 6379 LISTEN 0 128 127.0.0.1:6379 *:* users:(("redis-server",pid=2531,fd=4)) 

In Linux, To find a process running on a port, do below:

lsof -i :<port_number> 

example:

lsof -i :8080 

also if you want to list running processes that are speaking TCP you can use

sudo netstat -tnp sudo to get processes you don't own -t for TCP -n for numeric -p for pid 

to get processes speaking UDP replace the -t with a -u

sudo netstat -unp