如何查找和取消绑定的套接字

Question

I get a "bind: Address already in use" error. Is there any way to find which socket is bound? When I find it, how to I unlink it?

Answer 1

A socket is binded to a process. You just need to find that process id using:

netstat -nap

The -p flag will include the process id but you have to be root

tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 11152/lighttpd

In this example port 8080 is assigned to lighttpd, process id 11152

The command to list files opened by processes (lsof) will give similar information

Once you found the process id, you can simply kill it by issuing:

kill [pid]