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Maxabout.com > Tips
Who Owns This PortAdded on:8/15/2008 9:59:14 PM
In Linux Tips Rated by 1 users
- Several utilities exist to check which ports are open, who is connected to your system and even what process owns a port number.
- First a few ground rules. Ports below 1024 are reserved for common services, and only root can use them. Standard port numbers can be found in /etc/services. The maximum number of ports is 65k, so you have more than enough Internet ports for all your services.
- Here are some useful utilities. Netstat is a command that will list both the open ports and who is connected to your system. You should run it like this:
netstat -an | more
This way you can find out who is connected to which service.
- Another interesting command is the fuser program. This program can tell you which user and process owns a port. For example, the following command will tell you who owns port 6000:
fuser -v -n tcp 6000
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